MPQ2143DJ-LF-P

MPQ2143 3A, 5.5V, 1.2MHz, 40μA IQ, COT Synchronous Step-Down Switcher AEC-Q100 Qualified DESCRIPTION FEATURES The MPQ2143 is a monolithic, step-down, switch-mode converter with internal power MOSFETs. It can achieve up to 3A continuous output current from a 2.5V–to-5.5V input voltage with excellent load and line regulation. The output voltage can be regulated as low as 0.6V. • • • • • • • Constant-on-time control provides fast transient response and eases loop stabilization. Faultcondition protections include cycle-by-cycle current limiting and thermal shutdown. The MPQ2143 is available in small TSOT23-8 package and requires only a minimal number of readily-available standard external components. The MPQ2143 is ideal for a wide range of applications including high-performance DSPs, FPGAs, smartphones, portable instruments, and DVD drivers. • • • • • • • • Guaranteed Industrial/Automotive Temp Wide 2.5V-to-5.5V Operating Input Range Output Voltage as Low as 0.6V 100% Duty Cycle in Dropout Up to 3A Output Current Low IQ: 40µA 80mΩ and 40mΩ Internal Power MOSFET Switches Default 1.2MHz Switching Frequency EN and Power-Good for Power Sequencing Cycle-by-Cycle Over-Current Protection Auto Discharge at Power Off Short-Circuit Protect with Hiccup Mode Stable with Low-ESR Output Ceramic Capacitors Available in a TSOT23-8 Package Available in AEC-Q100 Grade 1 APPLICATIONS • • • Low Voltage I/O System Power Handheld/Battery-powered Systems Wireless/Networking Cards All MPS parts are lead-free, halogen free, and adhere to the RoHS directive. For MPS green status, please visit MPS website under Quality Assurance. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MPQ2143 MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 1 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED ORDERING INFORMATION Part Number MPQ2143DJ* MPQ2143DJ-AEC1** Package TSOT23-8 TSOT23-8 Top Marking ACE ACE * For Tape & Reel, add suffix –Z (e.g. MPQ2143DJ–Z); For RoHS compliant packaging, add suffix –LF (e.g. MPQ2143DJ–LF–Z) PACKAGE REFERENCE SOT23-8 θJA θJC ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance (4) Supply Voltage VIN ......................................... 6V VSW ........................ (-3V for < 5ns) to (VIN+0.3V) All Other Pins .................................-0.3V to +6 V Junction Temperature ...............................150°C Lead Temperature ....................................260°C Continuous Power Dissipation (TA = 25°C) (2) ……….….. ............................................... 1.25W Storage Temperature ............... -65°C to +150°C TSOT23-8 .............................. 100 ..... 55... °C/W Recommended Operating Conditions (3) Supply Voltage VIN .......................... 2.5V to 5.5V Output Voltage VOUT ................. 0.6V to VIN -0.5V Operating Junction Temp. (TJ). -40°C to +125°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 will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7, 4-layer PCB. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 2 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED ELECTRICAL CHARACTERISTICS VIN = 5V, TJ= 40°C to + 125°C, Typical values are at TJ=+25°C, unless otherwise noted. Parameter Symbol Feedback Voltage VFB Feedback Current PFET Switch ON Resistance NFET Switch ON Resistance IFB Condition 2.5V ≤ VIN ≤ 5.5V o o TJ=-40 C to +125 C Min Typ Max -1.5% 0.600 +1.5% -2% VFB = 0.63V 10 65 40 RDSON_P RDSON_N VEN = 0V, VIN = 5V, TJ=+25°C Switch Leakage +2% 0.1 TJ=-40°C to +125°C PFET Current Limit NFET Switch Sinking Current INSW ON Time tON Switching frequency Minimum OFF Time Soft-Start Time Soft-Stop Time Power-Good Upper Trip Threshold Power-Good Lower Trip Threshold Power-Good Delay Power-Good Sink Current Capability Power-Good Logic High Voltage Power-Good Internal Pull-Up Resistor Under-Voltage Lockout Threshold Rising Under-Voltage Lockout Threshold Hysteresis EN Input Logic Low Voltage EN Input Logic High Voltage fs TJ=+25°C TJ=-40°C to +125°C VOUT=1.2V, VFB=0.7V VIN=5V, VOUT=1.2V VIN=3.6V, VOUT=1.2V VIN=5V, VOUT=1.2V, IOUT=1A TJ=-40oC to +125oC V/% nA mΩ mΩ 2 μA 35 4.2 4.0 -20% -25% tMIN-OFF tSS-ON tSS-OFF PGH Units FB voltage respect to the regulation 4.8 100 200 277 1200 1200 50 1.3 1 A μA nS +20% +25% kHz kHz ns ms ms +10% % PGL -10% % PGD 110 μs VPG-L Sink 1mA VPG-H VIN=5V, VFB=0.6V, TJ=+25°C TJ=-40°C to +125°C 0.4 4.9 V V 4.85 RPG kΩ 500 2.0 2.2 2.4 150 mV 0.4 1.2 MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. V V V 3 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED ELECTRICAL CHARACTERISTICS (continued) VIN = 5V, TJ= 40°C to + 125°C, Typical values are at TJ=+25°C, unless otherwise noted. Parameter EN Input Current Supply Current (Shutdown) Supply Current (Quiescent) Thermal Shutdown(5) Thermal Hysteresis(5) Symbol Condition VEN=2V VEN=0V VEN=0V VEN=2V, VFB=0.63V, VIN=3.6V Min Typ Max Units 2 0.1 0.1 μA μA μA 40 μA 150 30 °C °C Notes: 5) Guaranteed by design. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 4 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED TYPICAL PERFORMANCE CHARACTERISTICS VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 5 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 6 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED .TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 7 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED TYPICAL PERFORMANCE CHARACTERISTICS (continued) VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 8 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED PIN FUNCTIONS TSOT23 Pin # Name 1 PG 2 VIN 3 4 5 6 SW PGND OUT AGND 7 FB 8 EN Description Power-Good Indicator. The pin output is an open drain that connects to VIN by an internal pull-up resistor. PG is pulled up to VIN when the FB voltage is within 10% of the regulation level. If FB voltage is out of that regulation range, it is LOW. Supply Voltage. The MPQ2143 operates from a 2.5V-to-5.5V unregulated input. C1 prevents large voltage spikes from appearing at the input. Switch Output Power Ground Input Sense. For output voltage feedback Analog ground. Reference for the internal control circuit. Feedback pin. Connect an external resistor divider from the output to GND to set the output voltage. On/Off Control MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 9 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED FUNCTIONAL BLOCK DIAGRAM VIN Bias & Voltage Reference EN Soft start/off + COMP VTH Lo-Iq 0.6V RST + + E.A. - Constant On-Time Pulse Lo-Iq Main Switch (PCH) PDRV PWM PWM + + FB SW EN FBCOMP Driver VOUT Lo-Iq Ramp generator Synchronous Rectifier (NCH) SW Lo-Iq Hi-Z NDRV OUT PGND IN FB for fixed output 0.66V + + COMP COMP - Lo-Iq + AGND COMP 0.54V PG - Figure 1: Functional Block Diagram MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 10 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED OPERATION The MPQ2143 uses constant on-time control with input-voltage feed-forward to stabilize the switching frequency over its full input range. At light load, the MPQ2143 employs a proprietary control over the low-side MOSFET (LS-FET) and inductor current to eliminate ringing on switching node and to improve efficiency. Constant On-Time Control When compared to fixed-frequency PWM control, constant on-time control offers a simpler control loop and faster transient response. By using input-voltage feed-forward, the MPQ2143 maintains a nearly constant switching frequency across the entire input and output voltage range. The switching pulse ON time can be estimated as: t ON = VOUT ⋅ 0.833µs VIN To prevent inductor current runaway during the load transient, the MPQ2143 has a fixed minimum OFF time of 50ns. However, this minimum OFF time limit does not affect the operation of the MPQ2143 in steady state in any way. Light Load Operation In light load condition, the MPQ2143 uses a proprietary control scheme to save power and improve efficiency: It gradually ramps down the LS-FET current to its minimum instead of turning off the LS-FET immediately when the inductor current starts to reverse. The gradual current drop avoids ringing at the switching node that always occurs in discontinuous conduction mode (DCM) operation. Enable When the input voltage exceeds the undervoltage lockout (UVLO) threshold—typically 2.2V—the MPQ2143 is enabled by pulling the EN pin above 1.2V. Leaving the EN pin floating or grounded will disable the MPQ2143. There is an internal 1MΩ resistor from the EN pin to ground. Soft-Start/Stop MPQ2143 has a built-in soft-start that ramps up the output voltage at a constant slew rate that avoids overshooting at startup. The soft-start time is typically about 1ms. When disabled, the MPQ2143 ramps down the internal reference voltage to allow the load to linearly discharge the output. Power GOOD Indictor MPQ2143 has an open drain with 500kΩ pullup resistor pin for power good (PG) indication. When the FB pin is within ±10% of regulation voltage (0.6V), the PG pin is pulled up to VIN by the internal resistor. If the FB pin voltage is outside the ±10% window, the PG pin is pulled to ground by an internal MOSFET. The MOSFET has a maximum Rdson of less than 100Ω. Current limit The MPQ2143 has a 4.8A current limit for the high side switch (HS-FET). When the HS-FET hits its current limit, the MPQ2143 enters hiccup mode until the current drops to prevent the inductor current from building and possibly damaging the components. Short Circuit and Recovery The MPQ2143 also enters short-circuit protection (SCP) mode when it hits the current limit, and tries to recover from the short circuit by entering hiccup mode. In SCP, the MPQ2143 disables the output power stage, discharges a soft-start capacitor, and then enacts a soft-start procedure. If the short-circuit condition still holds after soft-start ends, the MPQ2143 repeats this operation until the short circuit ceases and output rises back to regulation level. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 11 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED APPLICATION INFORMATION COMPONENT SELECTION Where ΔIL is the inductor ripple current. Setting the Output Voltage Choose an inductor current to be approximately 30% of the maximum load current. The maximum inductor peak current is: The external resistor divider sets the output voltage (see the Typical Application schematic on page 1). The feedback resistor R1 must account for both stability and dynamic response, and thus can not be too large or too small. Choose an R1 value between 120kΩ and 200kΩ. R2 is then given by: R2 = R1 Vout −1 0.6 The feedback circuit is shown as Figure 2. Figure 2: Feedback Network Table 1 lists the recommended resistors values for common output voltages. Table 1: Resistor Values for Common Output Voltages VOUT (V) 1.0 1.2 1.8 2.5 3.3 R1 (kΩ) 200(1%) 200(1%) 200(1%) 200(1%) 200(1%) R2 (kΩ) 300(1%) 200(1%) 100(1%) 63.2(1%) 44.2(1%) Selecting the Inductor A 0.82µH to 4.7µH inductor is recommended for most applications. For highest efficiency, chose an inductor with a DC resistance less than 15mΩ. For most designs, the inductance value can be derived from the following equation. L1 = VOUT × (VIN − VOUT ) VIN × ∆IL × fOSC IL(MAX) = ILOAD + ∆IL 2 Selecting the Input Capacitor The input current to the step-down converter is discontinuous, and requires a capacitor to supply the AC current to the step-down converter while maintaining the DC input voltage. Use low-ESR capacitors for the best performance. Ceramic capacitors with X5R or X7R dielectrics are highly recommended because of their low ESR values and small temperature coefficients. For most applications, a 10µF capacitor is sufficient. For higher output voltage, use 47μF to improve system stability. Since the input capacitor absorbs the input switching current it requires an adequate ripple current rating. The RMS current in the input capacitor can be estimated by: IC1 = ILOAD × VOUT  VOUT  × 1− VIN  VIN  The worse case condition occurs at VIN = 2VOUT, where: IC1 = ILOAD 2 For simplification, choose an input capacitor whose RMS current rating greater than half of the maximum load current. The input capacitor can be electrolytic, tantalum or ceramic. When using electrolytic or tantalum capacitors, use a small high-quality ceramic capacitor (0.1μF), placed as close to the IC as possible. When using ceramic capacitors, make sure that they have enough capacitance to prevent excessive voltage ripple at input. The input voltage ripple caused by capacitance can be estimated by: ∆V = IN  ILOAD V V  × OUT ×  1 − OUT  fS × C1 VIN  VIN  MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 12 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED Selecting the Output Capacitor The output capacitor (C2) maintains the output DC voltage. Use ceramic capacitors. Low-ESR capacitors keep the output voltage ripple low. The output voltage ripple can be estimated by: ∆VOUT =  VOUT  VOUT   1 × 1−   ×  RESR + fS × L1  VIN   8 × fS × C2  Where L1 is the inductor value and RESR is the equivalent series resistance of the output capacitor. 1 8 2 7 3 6 4 5 C2 GND R3 C2A  V  VOUT ×  1 − OUT  2 VIN  8 × fS × L1 × C2  VIN OUT L1 R1 = ΔVOUT SW R4 R2 Using ceramic capacitors, the impedance at the switching frequency is dominated by the capacitance. The output voltage ripple is mainly caused by the capacitance. For simplification, the output voltage ripple can be estimated by: The high current paths (GND, IN, and SW) should be placed very close to the device using short, direct, and wide traces. The input capacitor needs to be as close as possible to the IN and GND pins. The external feedback resistors should be placed next to the FB pin. Keep the switching node SW short and away from the feedback network. C1A C1 Figure 3: Layout Recommendation For tantalum or electrolytic capacitors, the ESR dominates the impedance at the switching frequency. For simplification, the output ripple can be approximated as: ΔVOUT = VOUT  V ×  1 − OUT fS × L1  VIN   × RESR  The characteristics of the output capacitor also affect the stability of the regulation system. PCB Recommendation of MPQ2143 Proper layout of the switching power supplies is very important, and sometimes critical for proper operation. For high-frequency switching converters, poor layout could lead to poor line or load regulation and stability issues. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 13 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED TYPICAL APPLICATION CIRCUITS MPQ2143 Figure 4: MPQ2143 Typical Application Circuit MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 14 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED PACKAGE INFORMATION TSOT23-8 See note 7 EXAMPLE TOP MARK PIN 1 ID IAAAA RECOMMENDED LAND PATTERN TOP VIEW SEATING PLANE SEE DETAIL ''A'' FRONT VIEW SIDE VIEW NOTE: DETAIL ''A'' 1) ALL DIMENSIONS ARE IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSION OR GATE BURR. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSION. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.10 MILLIMETERS MAX. 5) JEDEC REFERENCE IS MO-193, VARIATION BA. 6) DRAWING IS NOT TO SCALE. 7) PIN 1 IS LOWER LEFT PIN WHEN READING TOP MARK FROM LEFT TO RIGHT, (SEE EXAMPLE TOP MARK) MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 15 MPQ2143 – 3A, 5.5V, 1.2MHz, 40μA IQ, COT SYNCHRONOUS STEP-DOWN SWITCHER AEC-Q100 QUALIFIED Revision History Revision # 1.01 Revision Description Date 06/23/2020 Changing page 3 & 4, move the (5) to OTP Pages Updated Page 3, 4 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. MPQ2143 Rev. 1.01 www.MonolithicPower.com 6/23/2020 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2020 MPS. All Rights Reserved. 16