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MPQ2177AGQHE-AEC1-P

MPQ2177AGQHE-AEC1-P

  • 厂商:

    MPS(美国芯源)

  • 封装:

    VFDFN8

  • 描述:

    降压 开关稳压器 IC 正 可调式 0.6V 1 输出 1A 8-VFDFN

  • 数据手册
  • 价格&库存
MPQ2177AGQHE-AEC1-P 数据手册
 MPQ2177A 5.5V, 1A, 2.4MHz, Synchronous Step-Down Converter with Power Good and Soft Start, AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ2177A is a monolithic, step-down, switch-mode converter with integrated internal power MOSFETs. It can achieve up to 1A of continuous output current (IOUT) across a 2.5V to 5.5V input voltage (VIN) range, with excellent load and line regulation. The output voltage (VOUT) can be regulated to as low as 0.6V. • The MPQ2177A is ideal for a wide range of applications, including automotive clusters, telematics, and infotainment systems. • Constant-on-time (COT) control provides fast transient response and eases loop stabilization. Fault protections include cycle-by-cycle current limiting and thermal shutdown. The MPQ2177A requires a minimal number of readily available, standard external components, and is available in a compact QFN-8 (1.5mmx2mm) package. • • • • Designed for Automotive Applications: o Wide 2.5V to 5.5V Operating Input Voltage (VIN) Range o Up to 1A Output Current (IOUT) o 1% Feedback (FB) Accuracy o -40°C to +150°C Operating Junction Temperature (TJ) Range o Available in AEC-Q100 Grade 1 Increased Battery Life: o 21μA Sleep Mode Quiescent Current (IQ) o AAM Mode for Increased Efficiency under Light-Load Conditions High Performance for Improved Thermals: o 75mΩ and 45mΩ Integrated Internal Power MOSFETs Optimized for EMC and EMI: o 2.4MHz Switching Frequency (fSW) o MeshConnectTM Flip-Chip Package Reduces Board Size and BOM: o Integrated Internal Power MOSFETs o Integrated Compensation Network o Available in a Compact QFN-8 (1.5mmx2mm) Package Additional Features o Enable (EN) for Power Sequencing o Power Good (PG) o 100% Duty Cycle o External Soft Start (SS) Control o Output Discharge o OVP and SCP with Hiccup Mode o Available in a Wettable Flank Package APPLICATIONS • • • • • Automotive Clusters, Telematics, and Infotainment Systems Camera Modules Key Fobs Industrial Supplies Battery-Powered Devices All MPS parts are lead-free, halogen-free, and adhere to the RoHS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS”, the MPS logo, and “Simple, Easy Solutions” are trademarks of Monolithic Power Systems, Inc. or its subsidiaries. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 1  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL APPLICATION Efficiency vs. Load Current vs. Power Loss VOUT SW VIN OFF ON FB PG SS GND EFFICIENCY (%) OUT MPQ2177A EN 100 90 80 70 60 50 40 30 20 10 0 VOUT = 1.2V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) 0.50 0.40 EFFICIENCY 0.30 VIN = 2.5V VIN = 3.3V VIN = 5V VIN = 5.5V 1 0.20 POWER LOSS 10 100 LOAD CURRENT (mA) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 0.10 POWER LOSS (W) VIN 0.00 1000 2  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 ORDERING INFORMATION Part Number* MPQ2177AGQHE-AEC1*** Package QFN-8 (1.5mmx2mm) Top Marking See Below MSL Rating** 1 * For Tape & Reel, add suffix -Z (e.g. MPQ2177AGQHE-AEC1-Z). ** Moisture Sensitivity Level Rating *** Wettable Flank TOP MARKING ME: Product code of MPQ2177AGQHE-AEC1 LL: Lot number PACKAGE REFERENCE TOP VIEW PG 1 8 FB VIN 2 7 OUT 3 6 SS GND 4 5 EN SW QFN-8 (5mmx2mm) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 3  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 PIN FUNCTIONS Pin # Name Description 1 PG 2 VIN 3 SW 4 GND 5 EN 6 SS 7 OUT 8 FB Power good indicator. The PG pin is an open-drain output. Connect PG to a voltage source via an external resistor. If the feedback (FB) voltage (VFB) exceeds 90% of the reference voltage (VREF), then PG is pulled high. If VFB drops below 85% of VREF, then PG is pulled to GND. Float this pin if not used. Supply voltage. The MPQ2177A operates from a 2.5V to 5.5V input. A decoupling capacitor is required to prevent large voltage spikes at the input. Output switching node. The SW pin is the drain of the internal P-channel high-side MOSFET (HS-FET). Connect the inductor to SW to complete the converter. Ground. Enable (EN) control. Pull the EN pin above 0.9V to turn the converter on; pull EN below 0.65V or float EN to turn it off. There is an internal 2MΩ resistor connected between EN and GND. Soft start. Connect a capacitor between SS and GND to set the soft-start time (tSS) and to avoid start-up inrush current. The minimum recommended soft-start capacitance (CSS) is 1nF. Output voltage. Power rail and input sense pin for the output voltage (VOUT). Connect the load to this pin. An output capacitor (C2) is required to reduce the output voltage ripple (∆VOUT). Feedback (FB). The FB pin is tapped to an external resistor divider connected between the output and GND. To set the regulation voltage, VFB is compared to the internal VREF (0.6V). θJA θJC ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance All pins ........................................ -0.3V to +6.5V Junction temperature ............................... 150°C Lead temperature .................................... 260°C Continuous power dissipation (TA = 25°C) (2) (5) ……….….. .................................................2.2W Storage temperature ................ -65°C to +150°C QFN-8 (1.5mmx2mm) JESD51-7 (3) (4)….......................130.....25.... °C/W EVQ2177A-LE-00A (5)..............59.....14.... °C/W ESD Ratings Human body model (HBM) .................... ±2000V Charged device model (CDM) ................. ±750V Recommended Operating Conditions Input voltage (VIN) .......................... 2.5V to 5.5V Output voltage (VOUT)...............0.6V to VIN- 0.5V Operating junction temp (TJ) .... -40°C to +150°C Notes: 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the maximum junction temperature TJ (MAX), the junction-toambient thermal resistance θJA, and the ambient temperature TA. The maximum allowable continuous power dissipation at any ambient temperature is calculated by PD (MAX) = (TJ (MAX) - TA) / θJA. Exceeding the maximum allowable power dissipation can cause excessive die temperature, and the device may go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) Measured on JESD51-7, 4-layer PCB. 4) The values given in this table are only valid for comparison with other packages and cannot be used for design purposes. These values were calculated in accordance with JESD51-7, and simulated on a specified JEDEC board. They do not represent the performance obtained in an actual application. 5) Measured on the EVQ2177A-LE-00A, a 4-layer, 6.3cmx6.3cm PCB with 2oz per layer. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 4  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 ELECTRICAL CHARACTERISTICS VIN = 3.6V, TJ = -40°C to +150°C, typical values are tested at TJ = 25°C, unless otherwise noted. Parameter Input range Under-voltage lockout (UVLO) rising threshold UVLO threshold hysteresis Shutdown current Quiescent current Feedback (FB) voltage Symbol VIN VUVLO_ Condition RISING VUVLO_HYS ISD IQ VFB VEN = 0V, TJ = 25°C VEN = 0V, TJ = -40°C to +125°C (6) VEN = 0V, TJ = -40°C to +150°C VEN = 2V, VFB = 0.63V, VIN = 3.6V, TJ = 25°C VEN = 2V, VFB = 0.63V, VIN = 3.6V, TJ = -40°C to +125°C (6) VEN = 2V, VFB = 0.63V, VIN = 3.6V, TJ = -40°C to +150°C TJ = 25°C TJ = -40°C to +150°C VFB = 0.63V FB current IFB P-channel high-side MOSFET RDS(ON)_HS VIN = 5V (HS-FET) on resistance N-channel low-side MOSFET RDS(ON)_LS VIN = 5V (LS-FET) on resistance Zero-current detection (ZCD) threshold VEN = 0V, VIN = 6V, VSW = 0V or 6V, TJ = 25°C Switch leakage current VEN = 0V, VIN = 6V, VSW = 0V or 6V, TJ = -40°C to +125°C (6) Switching frequency fSW VIN = 5V, VOUT = 1.2V, CCM Minimum on time (6) tMIN_ON VIN = 5V Minimum off time (6) tMIN_OFF VIN = 5V P-channel HS-FET peak ILIMIT_PEAK current limit N-channel LS-FET valley ILIMIT_VALLEY current limit Soft-start current ISS Maximum duty cycle Power good (PG) UVLO VPG_UVLO_ FB rising edge rising threshold RISING VPG_UVLO_ PG UVLO falling threshold FB falling edge FALLING PG delay PG sink current capability PG logic high voltage Self-biased PG PG leakage current and logic high Enable (EN) start-up delay EN shutdown delay EN input logic low voltage Min 2.5 tPGD VPG_LOW VPG_HIGH PG rising/falling edge Sink 1mA VIN = 5V, VFB = 0.6V VIN = 0V, VEN = 0V, PG is pulled up between 3V and 5.5V via a 100kΩ resistor Typ Max 5.5 Units V 2.3 2.45 V 1 3 20 mV μA μA μA 30 μA 40 μA 80 μA 200 0.01 21 594 591 600 600 50 606 609 100 75 110 mΩ 45 70 mΩ 50 0 mV nA mA 1 μA 30 μA 2000 2400 50 80 2640 kHz ns ns 1.6 2.5 3.4 A 0.4 1 1.6 A 1.5 3 100 4.5 µA % VFB 87 90 93 % VFB 82 85 88 % VFB 0.4 ms V V 0.7 V 100 nA 80 4.9 5V logic high EN on to SW active EN off to stop switching 0.4 100 30 0.65 MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. µs µs V 5  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 ELECTRICAL CHARACTERISTICS (continued) VIN = 3.6V, TJ = -40°C to +150°C, typical values are tested at TJ = 25°C, unless otherwise noted. Parameter EN input logic high voltage EN pull-down resistor Output discharge resistor EN input current Symbol Condition Min Typ 0.9 2 150 1.2 0 Max 1.2 Units V MΩ Ω μA μA 110 115 120 % VFB RDISCHARGE VEN = 0V, VOUT = 1.2V VEN = 2V VEN = 0V Output over-voltage protection VOVP_RISING (OVP) rising threshold Output OVP hysteresis VOVP_HYS Output over-voltage (OV) delay LS-FET current limit Current flows from SW to GND Absolute VIN OVP After VOUT OVP is enabled Absolute VIN OVP hysteresis Thermal shutdown (6) Thermal shutdown hysteresis (6) 10 2 1.2 6.1 160 170 20 % VFB µs A V mV °C °C Note: 6) Guaranteed by design and bench characterization. Not tested in production. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 6  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL CHARACTERISTICS VIN = 3.6V, TJ = -40°C to +150°C, unless otherwise noted. VIN UVLO Threshold vs. Temperature EN Threshold vs. Temperature 0.95 2.35 0.90 0.85 2.25 Rising Falling 2.20 VEN (V) VIN_UVLO (V) 2.30 2.15 0.80 0.75 Rising Falling 0.70 0.65 0.60 2.10 0.55 2.05 0.50 -50 -25 0 25 50 75 100 125 150 -50 -25 TEMPERATURE (°C) 0 25 50 75 100 125 150 TEMPERATURE (°C) Shutdown Current vs. Temperature Quiescent Current vs. Temperature 1.2 33 31 1.0 29 IQ (μA) ISD (μA) 0.8 0.6 0.4 27 25 23 21 0.2 19 17 0.0 -50 -25 0 25 50 75 -50 100 125 150 -25 600.4 2480 600.2 2460 600.0 2440 599.4 599.2 50 75 100 125 150 Switching Frequency vs. Temperature fSW (kHz) VFB (mV) Feedback Voltage vs. Temperature 599.6 25 TEMPERATURE (°C) TEMPERATURE (°C) 599.8 0 2420 2400 2380 2360 599.0 2340 598.8 2320 598.6 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 7  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL CHARACTERISTICS (continued) VIN = 3.6V, TJ = -40°C to +150°C, unless otherwise noted. RDS(ON)_HS vs. Temperature RDS(ON)_HS vs. Temperature 65 100 60 90 RDSON_LS (mΩ) RDSON_HS (mΩ) 95 85 80 75 70 55 50 45 40 65 60 35 -50 -25 0 25 50 75 100 125 150 -50 -25 TEMPERATURE (°C) 50 75 100 125 150 HS-FET Peak Current Limit vs. Temperature 1.015 2.52 1.010 2.51 2.50 1.005 ILIMIT_PEAK (A) ILIMIT_VALLEY (A) 25 TEMPERATURE (°C) LS-FET Valley Current Limit vs. Temperature 1.000 0.995 0.990 0.985 2.49 2.48 2.47 2.46 2.45 0.980 2.44 -50 -25 0 25 50 75 100 125 150 -50 -25 TEMPERATURE (°C) 0 25 50 75 100 125 150 TEMPERATURE (°C) LS-FET Reverse Current Limit vs. Temperature PG Threshold vs. Temperature PG THRESHOLD (% OF VFB) 1.210 1.205 ILIMIT_REVERSE (A) 0 1.200 1.195 1.190 1.185 1.180 1.175 1.170 91 90 89 PG Rising Threshold PG Falling Threshold 88 87 86 85 84 83 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 8  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL CHARACTERISTICS (continued) VIN = 3.6V, TJ = -40°C to +150°C, unless otherwise noted. Zero-Current Detection Threshold vs. Temperature Soft-Start Current vs. Temperature 3.08 53 3.06 52 3.02 IZCD (mA) ISS (μA) 3.04 3.00 2.98 2.96 51 50 49 2.94 48 2.92 -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) -50 -25 0 25 50 75 100 125 150 TEMPERATURE (°C) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 9  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL PERFORMANCE CHARACTERISTICS VIN = 3.3V, VOUT = 1.2V, L = 2.2μH, C2 = 22µF, TA = 25°C, unless otherwise noted. Efficiency vs. Load Current vs. Power Loss Efficiency vs. Load Current VOUT = 1.2V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) 95 0.05 75 65 10 0.01 0.00 1 10 LOAD CURRENT (mA) 100 VOUT = 1.8V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) 90 0.48 85 0.36 VIN = 2.5V VIN = 3.3V VIN = 5V VIN = 5.5V 0.24 0.12 EFFICIENCY (%) 0.60 POWER LOSS (W) EFFICIENCY (%) 0.02 POWER LOSS Efficiency vs. Load Current 75 POWER LOSS 70 0.00 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 100 90 80 70 60 50 40 30 20 10 0 0.01 LOAD CURRENT (A) VIN = 3.3V VIN = 5V VIN = 5.5V VIN = 3V EFFICIENCY 0.1 1 LOAD CURRENT (mA) Efficiency vs. Load Current vs. Power Loss VOUT = 1.8V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) VOUT = 1.8V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) EFFICIENCY VIN = 3.3V VIN = 5V VIN = 5.5V VIN = 3V POWER LOSS 1 10 100 LOAD CURRENT (mA) 0.18 0.16 0.14 0.12 0.10 0.08 0.06 0.04 0.02 0.00 200 EFFICIENCY (%) Efficiency vs. Load Current vs. Power Loss POWER LOSS (W) EFFICIENCY (%) 0.03 55 EFFICIENCY 97 94 91 88 85 82 79 76 73 70 0.04 VIN = 2.5V VIN = 3.3V VIN = 5V VIN = 5.5V 70 POWER LOSS (W) 0.06 80 60 VOUT = 1.2V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) 80 0.07 EFFICIENCY 85 Efficiency vs. Load Current vs. Power Loss 95 0.08 90 96 94 92 90 88 86 84 82 80 78 76 10 EFFICIENCY VIN = 3.3V VIN = 5V VIN = 5.5V VIN = 3V POWER LOSS 0.50 0.45 0.40 0.35 0.30 0.25 0.20 0.15 0.10 0.05 0.00 POWER LOSS (W) 100 90 80 70 EFFICIENCY 60 50 40 30 VIN = 2.5V VIN = 3.3V 20 VIN = 5V VIN = 5.5V 10 0 0.01 0.1 1 LOAD CURRENT (mA) EFFICIENCY (%) EFFICIENCY (%) VOUT = 1.2V, L = 2.2μH (XFL4020-222MEB, DCR = 21.35mΩ) 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0 LOAD CURRENT (A) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 10  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 1.2V, L = 2.2μH, C2 = 22µF, TA = 25°C, unless otherwise noted. Line Regulation 0.7 0.6 0.5 0.4 0.3 0.2 0.1 0.0 -0.1 -0.2 -0.3 VOUT = 1.2V LINE REGULATION (%) LOAD REGULATION (%) Load Regulation VIN=2.5V VIN=3.3V VIN=5V VIN=5.5V 0.5 VOUT = 1.2V 0.4 0.3 0.2 0.1 0.0 IOUT = 0.1A IOUT = 0.5A -0.1 IOUT = 1A -0.2 1 10 100 LOAD CURRENT (mA) 1000 2.5 3.0 3.5 4.0 4.5 5.0 INPUT VOLTAGE (V) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 5.5 11  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 1.2V, L = 2.2μH, C2 = 22µF, TA = 25°C, unless otherwise noted. Steady State Steady State IOUT = 0A IOUT = 1A CH2: VOUT/AC 2mV/div. CH2: VOUT/AC 10mV/div. CH3: VIN 1V/div. CH4: IL 500mA/div. CH3: VIN 1V/div. CH4: IL 500mA/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 20ms/div. 400ns/div. Start-Up through VIN Start-Up through VIN IOUT = 0A IOUT = 1A CH3: VIN 2V/div. CH2: VOUT 1V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH4: IL 1A/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 1ms/div. 1ms/div. Shutdown through VIN Shutdown through VIN IOUT = 0A IOUT = 1A CH3: VIN 2V/div. CH2: VOUT 1V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH4: IL 1A/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 20ms/div. 4ms/div. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 12  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 1.2V, L = 2.2μH, C2 = 22µF, TA = 25°C, unless otherwise noted. Start-Up through EN Start-Up through EN IOUT = 0A IOUT = 1A CH3: VEN 3V/div. CH3: VEN 3V/div. CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH4: IL 1A/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 1ms/div. 1ms/div. Shutdown through EN Shutdown through EN IOUT = 0A IOUT = 1A CH3: VEN 3V/div. CH3: VEN 3V/div. CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH4: IL 500mA/div. CH4: IL 1A/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 20ms/div. 20µs/div. SCP Entry SCP Entry IOUT = 0A IOUT = 1A CH3: VPG 2V/div. CH3: VPG 2V/div. CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH4: IL 2A/div. CH4: IL 2A/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 200µs/div. 200µs/div. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 13  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 1.2V, L = 2.2μH, C2 = 22µF, TA = 25°C, unless otherwise noted. SCP Recovery SCP Recovery IOUT = 0A IOUT = 1A CH2: VOUT 1V/div. CH3: VPG 2V/div. CH2: VOUT 1V/div. CH3: VPG 2V/div. CH4: IL 2A/div. CH4: IL 2A/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 400µs/div. 400µs/div. PG Start-Up through VIN Short Circuit Protection (SCP) CH2: VOUT 1V/div. CH3: VPG 2V/div. IOUT = 1A CH3: VIN 2V/div. CH2: VOUT 1V/div. CH4: IL 1A/div. CH4: VPG 2V/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 200µs/div. 1ms/div. PG Shutdown through VIN PG Start-Up through EN IOUT = 1A IOUT = 1A CH3: VEN 3V/div. CH3: VIN 2V/div. CH2: VOUT 1V/div. CH2: VOUT 1V/div. CH4: VPG 2V/div. CH4: VPG 2V/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 4ms/div. 1ms/div. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 14  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 3.3V, VOUT = 1.2V, L = 2.2μH, C2 = 22µF, TA = 25°C, unless otherwise noted. PG Shutdown through EN Load Transient IOUT = 1A IOUT = 0.5A to 1A, 1A/μs CH3: VEN 3V/div. CH3: VPG 2V/div. CH2: VOUT/AC 50mV/div. CH2: VOUT 1V/div. CH4: VPG 2V/div. CH4: IOUT 500mA/div. CH1: VSW 2V/div. CH1: VSW 2V/div. 40µs/div. 80µs/div. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 15  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 FUNCTIONAL BLOCK DIAGRAM VIN EN Bias Voltage and VREF R1 2M Soft Start + COMP - VTH SS 0.6V RST + + EA - ConstantOn-Time Control R2 25k C1 25pF + EN FB + COMP FB PDRV PWM Main Switch (PCH) PWM SW Driver - VOUT Ramp Generator SW NDRV Synchronous Rectifier (NCH) OUT GND 0.54V + COMP - PG Figure 1: Functional Block Diagram MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 16  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 OPERATION The MPQ2177A employs input voltage (VIN) feed-forward and constant-on-time (COT) control to stabilize the switching frequency (fSW) across the entire VIN range. It can achieve 1A of continuous output current (IOUT) across a 2.5V to 5.5V VIN range, with excellent load and line regulation. The output voltage (VOUT) can be regulated to as low as 0.6V. 100% maximum duty cycle can be reached in low-dropout mode. Constant-On-Time (COT) Control COT control provides a simpler control loop and faster transient response. The MPQ2177A’s switching cycles have a fixed minimum off time (tOFF_MIN) to prevent inductor current (IL) runaway during load transient. If the low-side MOSFET (LS-FET) turns on, it remains on for at least tMIN_OFF (typically 80ns). The high-side MOSFET (HS-FET) turns on once the feedback (FB) voltage (VFB) drops below the reference voltage (VREF). This indicates an insufficient VOUT. Input voltage feed-forward allows the device to maintain a nearly constant fSW across the input range and load range. The fSW on time (tON) can be calculated with Equation (1): t ON = VOUT  400ns VIN Advanced Asynchronous Modulation (AAM) Mode under Light-Load Conditions The device features advanced asynchronous modulation (AAM) mode and a zero-current detection (ZCD) circuit for light-load operation. The AAM current (IAAM) is set internally. The SW pin’s on time (tON) is determined by the on-timer generator and AAM comparator. Under lightload conditions, SW’s tON exceeds the AAM comparator’s tON. Figure 2 shows the simplified AAM control logic. COT Generator VFB EN VREF FB Comparator IL_SENSE IAAM HS-FET Driver S Q R AAM Comparator Figure 2: Simplified AAM Control Logic If the AAM comparator’s tON exceeds the ontimer’s pulse, then the AAM comparator controls SW’s tON (see Figure 3). AAM IOUT (1) IL Light Load during AAM Mode AAM Sleep Mode The MPQ2177A employs sleep mode for high efficiency under light-load conditions. In sleep mode, most of the circuit block input currents (IIN) decrease, specifically the error amplifier (EA) and pulse-width modulation (PWM) comparator. As the load becomes lighter, the converter’s fSW decreases. If the load continues to decrease and the off time (tOFF) exceeds 3.5µs, then the MPQ2177A enters sleep mode. To further improve light-load efficiency, the converter consumes a very low quiescent current (IQ) while in sleep mode. Once an HS-FET pulse occurs, MPQ2177A exits sleep mode. IOUT IL Increased Load during AAM Mode Figure 3: AAM Comparator Control of SW’s tON When using a lower-value inductor, the AAM comparator’s tON is below the on-timer. Figure 4 shows the operation mode. The HS-FET depends on the on-timer; therefore the on-timer controls tON (see Figure 4). AAM IOUT IL Light Load with On-Timer AAM IOUT IL Increased Load with On-Timer Figure 4: On-Timer Controls of SW’s tON MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 17  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 Aside from the on-timer method, the AAM circuit has another AAM blanking time (150ns) for sleep mode. This means that if the on-timer drops below 150ns, then the HS-FET turns off after an on-timer pulse is generated without AAM control. In this scenario, IL may not reach the AAM threshold (see Figure 5). AAM IOUT IL 150ns 150ns Figure 5: AAM Blanking Time during Sleep Mode In sleep mode, the on-timer’s pulse is about 40% greater than its pulse during discontinuous conduction mode (DCM) and continuous conduction mode (CCM). Figure 6 shows how the AAM threshold decreases as tON increases gradually. For CCM, IOUT must exceed half of the AAM threshold. AAM THRESHOLD (mA) 600 Output Discharge If the MPQ2177A shuts down, the device initiates output discharge mode. The internal discharge MOSFET provides a resistive discharge path for the output capacitor (C2) between the OUT pin and GND. To block the output discharge path, add an external capacitor between VOUT and the OUT pin (see the Output Discharge Blocking section on page 21). Soft Start (SS) The MPQ2177A features external soft start (SS). To avoid overshoot during start-up, the SS pin ramps up VOUT at a controlled slew rate. The SS pin’s charge current is typically 3µA. The soft-start time (tSS) is determined by the external soft-start capacitor (CSS). tSS can be calculated with Equation (2): t SS (ms) = CSS (nF)  0.6V ISS (μA) (2) Where ISS is the internal soft-start charge current (3μA). 500 400 It is recommended that CSS be ≥1nF. 300 The device has a pre-biased start-up function. Once EN is pulled above 0.9V, the converter starts up regardless of any pre-biased voltage on the output. Pre-biased start-up works even while the output discharge path is blocked. 200 100 0 0 1 2 3 4 5 tON (μs) Figure 6: AAM Threshold Decreases as tON Increases The MPQ2177A employs ZCD to determine whether IL begins to reverse. If IL reaches the ZCD threshold (typically 50mA), then the LSFET turns off. Even if VOUT is close to VIN, AAM mode and ZCD allow the device to continually operate in DCM under light-load conditions. Enable (EN) Control The enable (EN) pin is a digital control pin that turns the MPQ2177A on and off. Pull EN above 0.9V to turn the converter on; pull EN below 0.65V or float EN to turn it off. Pulling EN to GND also disables the device. There is an internal 2MΩ resistor connected between EN and GND. Peak Current Limit and Valley Current Limit Both the HS-FET and LS-FET feature currentlimit protection. If IL reaches the HS-FET’s peak current limit (ILIMIT_PEAK) threshold (typically 2.5A), then the HS-FET turns off and the LSFET turns on to discharge the energy. The HSFET does not turn again until IL drops below the valley current limit (ILIMIT_VALLEY) threshold (typically 1A). This prevents current runaway during overload and short-circuit events. Short-Circuit Protection (SCP) and SCP Recovery Short-circuit protection (SCP) protects the circuitries from over-current (OC) faults. If a VOUT short to GND occurs and the device has exceeded its current limit, then SCP is triggered and the IC attempts to recover via hiccup mode. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 18  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 Once the soft-start voltage (VSS) is discharged completely, the device initiates a new SS. This process repeats until the fault condition is removed. Over-Voltage Protection (OVP) The MPQ2177A monitors VFB to detect overvoltage (OV) conditions. If VFB exceeds 115% of VREF, then the converter enters its dynamic regulation period. During this period, the LSFET remains on until the LS-FET current reaches -1.2A. This process discharges VOUT to keep it within its normal range. If the OV condition still remains after this process, there is a 1.5µs delay and then the LS-FET turns on again. Once VFB falls below 105% of VREF, the converter exits the regulation period. If the dynamic regulation period cannot prevent VOUT from increasing and a 6.1V VIN is detected, then over-voltage protection (OVP) is triggered and the device stops switching until VIN drops below 6V. Once VIN drops below 6V, the MPQ2177A resumes normal operation. Power Good (PG) Indicator The MPQ2177A has a power good (PG) output to indicate whether the converter is operating normally after start-up. PG is the open drain of an internal MOSFET. It is recommended that this MOSFET’s maximum RDS(ON) be below 400Ω. PG can be connected to VIN or an external voltage source via an external resistor (10kΩ to 100kΩ). Once VIN is applied, the MOSFET turns on and PG is pulled to GND before SS is ready. After VFB reaches 90% of VREF, PG is pulled high by the external voltage source. If VFB drops to 85% of VREF, then the PG voltage (VPG) is pulled to GND to indicate an output failure. If VINand EN are not available, and PG is pulled up via an external power supply, then PG self-biases and asserts. If a 100kΩ pull-up resistor is being used, then VPG should be below 0.7V. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 19  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 APPLICATION INFORMATION Setting the Output Voltage The external resistor divider sets the MPQ2177A’s adjustable output voltage (VOUT). Select a feedback (FB) resistor (R1) to reduce the VOUT leakage current (typically between 10kΩ and 100kΩ). Then R2 can then be calculated with Equation (3): R2 = R1 (3) VOUT −1 0.6 VOUT MPQ2177A R1 FB R2 Selecting the Inductor A 0.47µH to 2.2µH inductor is recommended for most applications. For high efficiency, select an inductor with a DC resistance below 25mΩ. L1 = Table 1 shows the recommended resistors value for common output voltages. Table 1: Resistor Values for Common Output Voltages R2 (kΩ) 47 (1%) 100 (1%) 18 (1%) 16 (1%) 15 (1%) VOUT +RDS(ON) _ P  IOUT t 1 − MIN _ OFF-9 400  10 VOUT  (VIN − VOUT ) VIN  IL  fSW (4) (5) Where ΔIL is the inductor ripple current. Choose an inductor with a ripple current rating that is approximately 30% of the maximum load current (ILOAD). The maximum inductor peak current (IL_MAX) can be calculated with Equation (6): IL(MAX) = ILOAD + Frequency Scaling at Low Input Voltages Under heavy-load conditions, the HS-FET voltage decreases as the on time (tON) increases and the duty cycle is extended. If the minimum off time (tOFF_MIN) is reached at a low input voltage and under heavy-load conditions, then fSW scales down. To maintain a constant fSW during heavy-load operation, a larger VOUT is required for a larger VIN. For a 1.8V VOUT at a 1A load, VIN should be above 2.7V to keep fSW above 2MHz. If the frequency begins to scale down, VIN can be estimated with Equation (4): VIN = 7) Guaranteed by design and bench characterization. Not tested in production. For most designs, the inductance (L1) can be estimated with Equation (5): Figure 7: Feedback Network R1 (kΩ) 30.9 (1%) 100 (1%) 36 (1%) 51 (1%) 68 (1%) Note: High-frequency, switch-mode power supplies with magnetic devices (such as the MPQ2177A) can have strong electromagnetic inference (EMI). It is recommended to avoid using unshielded power inductors, as they provide poor magnetic shielding. Shielded inductors (e.g. metal alloy or multi-layer chip power inductors) are highly recommended for their effective EMI reduction. Figure 7 shows the FB network. VOUT (V) 1 1.2 1.8 2.5 3.3 Where the maximum tMIN_OFF is 125ns. (7) IL 2 (6) Selecting the Input Capacitor The step-down converter has a discontinuous input current (IIN), and requires a capacitor to supply AC current to the converter while maintaining the DC input voltage. For the best performance, it is recommended to use lowESR capacitors. Ceramic capacitors with X5R or X7R dielectrics are strongly recommended due to their low ESR and small temperature coefficients. For most applications, a 10µF capacitor is sufficient. Higher output voltages may require a 22μF capacitor to increase system stability. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 20  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 The input capacitor (C1) requires an adequate ripple current rating to absorb the switching IIN. C1’s RMS current rating (IC1) can be estimated with Equation (7): IC1 = ILOAD  VOUT  VOUT   1− VIN  VIN  (7) The worst-case scenario occurs at VIN = 2 x VOUT, which can be calculated with Equation (8): IC1 = ILOAD 2 (8) For simplification, choose an input capacitor with an RMS current rating greater than half of the maximum load current. C1 can be an electrolytic, tantalum, or ceramic capacitor. When using electrolytic or tantalum capacitors, place a small, high-quality, 0.1μF ceramic capacitor as close to the IC as possible. When using ceramic capacitors, ensure that the capacitor has enough capacitance to prevent excessive voltage ripple at the input. The input voltage ripple (∆VIN) can be estimated with Equation (9):  V  I V VIN = LOAD  OUT   1 − OUT  fSW  C1 VIN  VIN  For simplification, ∆VOUT can be estimated with Equation (11): ΔVOUT =  V  VOUT   1 − OUT  2 8  fSW  L1  C2  VIN  Ceramic capacitors with X7R or X5R dielectrics are highly recommended due to their low ESR and small temperature coefficients. For tantalum or electrolytic capacitors, the ESR dominates the impedance at the switching frequency. For simplification, ∆VOUT can be estimated with Equation (12): ΔVOUT = VOUT V   1 − OUT fSW  L1  VIN    RESR  (12) C2’s characteristics can also affect the stability of the regulation system. Output Discharge Blocking If the device is disabled, an internal resistive discharge path between the OUT pin and GND is enabled to discharge C2. The discharge path can be blocked by adding an external capacitor between VOUT and the OUT pin (see Figure 8). VOUT (9) MPQ2177A Selecting the Output Capacitor The output capacitor (C2) stabilizes the DC VOUT. It is recommended to use ceramic capacitors for C2. Low-ESR capacitors are recommended, as they effectively limit the output voltage ripple (∆VOUT). ∆VOUT can be estimated with Equation (10): OUT VOUT = (11)  (10)  V   VOUT 1   1 − OUT    RESR +  fSW  L1  VIN   8  fS  C2  Where L1 is the inductance, and RESR is C2’s equivalent series resistance (ESR). Blocking Capacitor Figure 8: Circuit with VOUT Discharge Blocking The blocking capacitor should be at least 10nF to avoid influencing the loop and load transient. It is recommended to use a 10nF to 100nF blocking capacitor. A larger-value blocking capacitor does not have an impact on loop performance, but is physically larger and is typically unnecessary for the best results. When using ceramic capacitors, the capacitance dominates the impedance at the switching frequency and causes the majority of ∆VOUT. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 21  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 PCB Layout Guidelines Efficient PCB layout is critical for stable operation. Poor layout design can result in poor line and load regulation, as well as stability issues. For the best results, refer to Figure 9 and follow the guidelines below: 1. Place the high-current paths (GND, VIN, and SW) close to the IC with short, direct, and wide traces. 2. Place the input capacitor (C1) as close to the VIN and GND pins as possible. Top Layer 3. Place the output capacitor (C2) close to the GND pin. 4. For the adjustable-output version, place the external feedback resistors close to the FB pin. 5. Keep the switching node (SW) short and away from the feedback network. 6. Keep the VOUT_SENSE line (OUT) as short as possible, and place it as far away from the inductor as possible. OUT should not surround the inductor or be close to SW. Mid-Layer 1 Mid-Layer 2 Bottom Layer Figure 9: Recommended PCB Layout MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 22  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 TYPICAL APPLICATION CIRCUITS VIN = 5V 2 C1 C2 10μF 0.1μF SW VIN R1 100k OUT R4 100k 5 EN 0.65V 0.9V FB VOUT = 1.2V/1A C4 22μF R2 100k EN PG 6 ILIMIT (Typically 2.5A) 7 MPQ2177A 1 PG 3 L1 2.2μH 8 Typically 0.6V SS R3 100k GND C3 2.2nF 4 Figure 10: Typical Application Circuit (1.2V Output) VIN = 5V 2 C1 C2 10μF 0.1μF R1 100k OUT R4 100k 5 EN 0.65V 0.9V PG 6 SS C4 22μF R2 36k EN FB VOUT = 1.8V/1A ILIMIT (Typically 2.5A) 7 MPQ2177A 1 PG C3 2.2nF SW VIN 3 L1 1µH 8 Typically 0.6V R3 18k GND 4 Figure 11: Typical Application Circuit (1.8V Output) MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 23  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 PACKAGE OUTLINE DRAWING FOR 8L FCQFN (1.5X2.0MM)-2 MF-PO-D-0483 revision 0.0 PACKAGE INFORMATION QFN-8 (1.5mmx2mm) Wettable Flank PIN 1 ID 0.15X45º TYP PIN 1 ID MARKING PIN 1 ID INDEX AREA TOP VIEW BOTTOM VIEW SIDE VIEW SECTION A-A 0.15 X 45° NOTE: 1) THE LEAD SIDE IS WETTABLE. 2) ALL DIMENSIONS ARE IN MILLIMETERS. 3) LEAD COPLANARITIES SHALL BE 0.08 MILLIMETERS MAX. 4) JEDEC REFERENCE IS MO-220. 5) DRAWING IS NOT TO SCALE. RECOMMENDED LAND PATTERN MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 24  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 CARRIER INFORMATION Pin1 1 1 ABCD 1 1 ABCD ABCD ABCD Feed Direction Part Number MPQ2177AGQHEAEC1-Z Package Description QFN-8 (1.5mmx2mm) Quantity /Reel 5000 Quantity Quantity Reel Carrier Carrier /Tube /Tube Diameter Tape Width Tape Pitch N/A N/A 13in 8mm MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 4mm 25  MPQ2177A – 5.5V, 1A, 2.4MHz, SYNC STEP-DOWN CONVERTER, AEC-Q100 REVISION HISTORY Revision # Revision Date 1.0 08/06/2021 Description Pages Updated Initial Release - Notice: The information in this document is subject to change without notice. Please contact MPS for current specifications. Users should warrant and guarantee that third-party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications. MPQ2177A Rev. 1.0 MonolithicPower.com 8/6/2021 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2021 MPS. All Rights Reserved. 26
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