TPS51220ATRTVRQ1

TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com Fixed Frequency, 99% Duty Cycle Peak Current Mode Notebook System Power Controller Check for Samples: TPS51220A-Q1 FEATURES 1 • • • • 2 • • • • • • • Qualified for Automotive Applications Input Voltage Range: 4.5 V to 32 V Output Voltage Range: 1 V to 12 V Selectable Light Load Operation (Continuous / Auto Skip / Out-Of-Audio™ Skip) Programmable Droop Compensation Voltage Servo Adjustable Soft Start 200-kHz to 1-MHz Fixed-Frequency PWM Selectable Current/ D-CAP™ Mode Architecture 180° Phase Shift Between Channels Resistor or Inductor DCR Current Sensing Adaptive Zero Crossing Circuit • • • • • • • Powergood Output for Each Channel OCL/OVP/UVP/UVLO Protections (OVP Disable Option) Thermal Shutdown (Non-Latch) Output Discharge Function (Disable Option) Latch-Up exceeds 100mA per JESD78- Class I Integrated Boot Strap MOSFET Switch QFN-32 (RTV) Package APPLICATIONS • • I/O Bus Point of Load in LCD TV, MFP DESCRIPTION The TPS51220A-Q1 is a dual synchronous buck regulator controller with two LDOs. It is optimized for 5-V/3.3-V system controller, enabling designers to cost effectively complete 2-cell to 4-cell notebook system power supply. The TPS51220A-Q1 supports high efficiency, fast transient response, and 99% duty cycle operation. It supports supply input voltage ranging from 4.5 V to 32 V, and output voltages from 1 V to 12 V. Two types of control schemes can be chosen depending on the application. Peak current mode supports stability operation with lower ESR capacitor and output accuracy. The D-CAP mode supports fast transient response. The high duty (99%) operation and the wide input/output voltage range supports flexible design for small mobile PCs and a wide variety of other applications. The fixed frequency can be adjusted from 200 kHz to 1 MHz by a resistor, and each channel runs 180° out-of-phase. The TPS51220A-Q1 can also synchronize to the external clock, and the interleaving ratio can be adjusted by its duty. The TPS51220A-Q1 is available in the 32-pin 5×5/4×4 QFN package and is specified from –40°C to 105°C. 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. Out-Of-Audio, D-CAP, PowerPAD are trademarks of Texas Instruments. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2011, Texas Instruments Incorporated TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com TYPICAL APPLICATION CIRCUIT VBAT VBAT Q21 C01 C14 PGND C24 Q12 VO1 2 V5SW 3 RF 4 EN1 5 PGOOD1 6 SKIPSEL1 28 27 26 GN D V BS T2 DRVH1 29 C21 Q22 D R VL 2 SW 1 V B ST 1 1 30 D RV L1 31 VR E G5 32 PGND L2 PGND GND C11 PGND C22 PGND PGND PGND PGND 24 DRVH2 VIN 23 VBAT VREG3 22 VREG3 3.3V/10mA R01 C03 EN1 PGOOD1 SKIPSEL1 EN2 PGOOD2 20 PGOOD2 SKIPSEL2 19 10 11 12 13 18 CSN2 17 VF B 2 VR EF 2 9 CSP2 C OM P2 EN GND FU N C CSN1 R24 C O MP 1 CSP1 8 VF B 1 7 C13 14 15 16 C23 VREG5 R21 R23 VO1 VO2 R11 R12 R22 GND GND 2 GND SKIPSEL2 PowerPAD R14 EN 21 EN2 TPS51220A (QFN32) T RIP GND VO2 3.3V 25 SW 2 L1 VO1 5.0V VREG5 5V/100mA Q11 C12 C 02 R13 GND GND Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS51220A-Q1 TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. FUNCTIONAL BLOCK DIAGRAM VIN EN V5SW + 4.7V/ 4.5V + 1.25V + + VREG5 4.7V/ 4.5V VREG3 GND V5OK + 4.2V/ 3.8V Ready GND + THOK 150/ 140 Deg-C VREF2 1.25V GND GND CLK2 OSC RF CLK1 GND 1V +5%/ 10% + PGOOD1 Delay + 1V -30% 1V - 5%/ 10% + GND CLK1 UVP Ready + FUNC Fault2 OVP SDN2 1V +15% Fault1 COMP1 Clamp (+) Ramp Comp SDN1 + Clamp (-) CUR + PWM VFB1 VREG5 D-CAP 1V + EN1 VFB-AMP + Enable/ Soft-start Ramp Comp VBST1 + Skip Control Logic DRVH1 CS-AMP CSN1 SW1 + OCP + CSP1 VREF2 XCON VREG5 100mV TRIP DRVL1 AZC Discharge Control GND GND 100mV VREF2 N-OCP + GND OOA Ctrl GND SKIPSEL1 Channel-1 Switcher shown Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS51220A-Q1 3 TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) TPS51220A-Q1 Input voltage range (2) VIN –0.3 to 34 VBST1, VBST2 –0.3 to 39 VBST1, VBST2 (3) –0.3 to 7 SW1, SW2 –7 to 34 CSP1, CSP2, CSN1, CSN2 –1 to 13.5 EN, EN1, EN2, VFB1, VFB2, TRIP, SKIPSEL1, SKIPSEL2, FUNC –0.3 to 7 V –1 to 7 V5SW V5SW (to VREG5) Output voltage range (2) UNIT (4) –7 to 7 DRVH1, DRVH2 –7 to 39 V DRVH1, DRVH2 (3) –0.3 to 7 V DRVL1, DRVL2, COMP1, COMP2, VREG5, RF, VREF2, PGOOD1, PGOOD2 –0.3 to 7 V –0.3 to 3.6 V TJ Junction temperature 150 °C Tstg Storage temperature –55 to 150 °C VREG3 (1) (2) (3) (4) Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. These are stress ratings only and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. All voltage values are with respect to the network ground terminal unless otherwise noted. Voltage values are with respect to the corresponding SW terminal. When EN is high and V5SW is grounded, or voltage is applied to V5SW when EN is low. DISSIPATION RATINGS (2 oz. Trace and Copper Pad with Solder) PACKAGE TA < 25°C POWER RATING (W) DERATING FACTOR ABOVE TA = 25°C (mW/°C) TA = 105°C POWER RATING (W) 32-pin RTV 1.7 17 0.34 RECOMMENDED OPERATING CONDITIONS MIN Supply voltage VIN V5SW –0.8 6 VBST1, VBST2 –0.1 37 DRVH1, DRVH2 –4. 37 –0.1 6 -6 37 –4. 32 -6 32 CSP1, CSP2, CSN1, CSN2 –0.8 13 EN, EN1, EN2, VFB1, VFB2, TRIP, DRVL1, DRVL2, COMP1, COMP2, VREG5, RF, VREF2, PGOOD1, PGOOD2, SKIPSEL1, SKIPSEL2, FUNC –0.1 6 VREG3 –0.1 3.5 –40 105 DRVH1, DRVH2 (negative overshoot -6 V for t < 20% duration of the switching period) SW1, SW2 TA 4 MAX 32 DRVH1, DRVH2 (wrt SW1, 2) I/O voltage TYP 4.5 SW1, SW2 (negative overshoot -6 V for t < 20% duration of the switching period) Operating free-air temperature Submit Documentation Feedback UNIT V V °C Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS51220A-Q1 TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com ORDERING INFORMATION PACKAGE (1) TA QFN – RTV -40°C to 105°C (1) Reel of 3000 ORDERABLE PART NUMBER TOP-SIDE MARKING TPS51220ATRTVRQ1 51220AT For the most current package and ordering information, see the Package Option Addendum at the end of this document, or see the TI website at www.ti.com. ESD RATINGS TABLE PARAMTER VALUE UNIT Human Body Model (HBM) 2000 V Charged-Device Model 500 V Machine Model (MM) 100 V ESD ELECTRICAL CHARACTERISTICS over operating free-air temperature range, EN = 3.3V, VIN = 12V, V5SW = 5V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 7 15 μA 80 120 μA SUPPLY CURRENT IVINSDN VIN shutdown current VIN shutdown current, TA = 25°C, No Load, EN = 0V, V5SW = 0 V IVINSTBY VIN Standby Current VIN standby current, TA = 25°C, No Load, EN1 = EN2 = V5SW = 0 V IVBATSTBY VBAT Standby Current Vbat standby current, TA = 25°C, No Load SKIPSEL2 = 2V, EN2 = open, EN1 = V5SW = 0V (1) IV5SW V5SW Supply Current V5SW current, TA = 25°C, No Load, ENx = 5V, VFBx = 1.05 V 500 μA TRIP = 5 V 0.8 mA TRIP = 0 V 0.9 mA VREF2 OUTPUT VVREF2 VREF2 Output Voltage I(VREF2) < ±10 μA, TA = 25°C 1.98 2.00 2.02 I(VREF2) < ±100 μA, 4.5V < VIN < 32 V 1.97 2.00 2.03 V VREG3 OUTPUT V5SW = 0 V, I(VREG3) = 0 mA, TA = 25°C 3.279 3.313 3.347 VVREG3 VREG3 Output Voltage V5SW = 0 V, 0 mA < I(VREG3) < 10 mA, 5.5 V < VIN < 32 V 3.135 3.300 3.400 IVREG3 VREG3 Output Current VREG3 = 3 V 10 15 20 V5SW = 0 V, I(VREG5) = 0 mA, TA = 25°C 4.99 5.04 5.09 V5SW = 0 V, 0 mA < I(VREG5) < 100 mA, 6 V < VIN < 32 V 4.90 5.03 5.15 V5SW = 0 V, 0 mA < I(VREG5) < 100 mA, 5.5 V < VIN < 32 V 4.50 5.03 5.15 V5SW = 0 V, VREG5 = 4.5 V 100 150 200 V5SW = 5 V, VREG5 = 4.5 V 200 300 400 Turning on 4.55 4.7 4.83 Hysteresis 0.15 0.20 0.25 V mA VREG5 OUTPUT VVREG5 VREG5 Output Voltage V V IVREG5 VREG5 Output Current mA VTHV5SW Switchover Threshold tdV5SW Switchover Delay Turning on 7.7 ms RV5SW 5V SW On-Ressitance I(VREG5) = 100 mA 0.5 Ω V OUTPUT TA = 25°C, No Load VVFB VFB Regulation Voltage Tolerance IVFB VFB Input Current VFBx = 1.05 V, COMPx = 1.8 V, TA = 25°C RDISCHG CSNx Discharge Resistance ENx = 0 V, CSNx = 0.5 V, TA = 25°C (1) TA = –40°C to 105°C , No Load 0.9925 1.000 1.0075 0.990 1.000 1.010 –50 20 V 50 nA 40 Ω Specified by design. Detail external condition follows application circuit of Figure 57. Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS51220A-Q1 5 TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range, EN = 3.3V, VIN = 12V, V5SW = 5V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX UNIT VOLTAGE TRANSCONDUCTANCE AMPLIFIER gMv Gain VID Differential Input Voltage Range TA = 25°C ICOMPSINK COMP Maximum Sink Current COMPx = 1.8 V ICOMPSRC COMP Maximum Source Current COMPx = 1.8 V VCOMP VCOMPN μS 500 –30 30 mV TA = 0 to 105°C 27 33 μA TA = –40 to 105°C 22 33 μA –33 –43 μA COMP Clamp Voltage 2.18 2.22 2.26 V COMP Negative Clamp Voltage 1.73 1.77 1.81 V CURRENT AMPLIFIER GC Gain VIC Common mode Input Voltage Range VID Differential Input Voltage Range TRIP = 0V/2V, CSNx = 5V, TA = 25°C (2) TRIP = 3.3V/5V, CSNx = 5V, TA = 25°C 3.333 (2) 1.667 TA = 25°C 0 13 V –75 75 mV POWERGOOD PG in from lower 92.5% PG in from higher 95% 97.5% VTHPG PG threshold 102.5% 105% 107.5% IPG PG sink current PGOOD = 0.5 V 5 IPG(LK) PG leak current PGOOD = 5 V 0 1 µA tPGDLY PGOOD delay Delay for PG in 1.0 1.2 ms tSSDYL Soft Start Delay Delay for Soft Start, ENx = Hi to SS-ramp starts 200 μs tSS Soft Start Time Internal Soft Start 960 μs PG hysteresis 5% 0.8 mA SOFTSTART FREQUENCY AND DUTY CONTROL fSW Switching Frequency VTHRF RF Threshold fSYNC Sync Input Frequency Range (2) tON(min) Minimum On Time tOFF(min) Minimum Off Time RF = 330 kΩ 273 303 333 Lo to Hi 0.7 1.3 2 Hysteresis 0.2 200 V 1000 kHz 120 V(DRVH) = 90% to 10%, No Load, Auto-skip 160 250 ns V(DRVH) = 10% to 90%, No Load ns 290 400 ns DRVH-off to DRVL-on 10 30 50 ns DRVL-off to DRVH-on 30 40 70 ns Dead time VDTH DRVH-off threshold DRVH to GND VDTL DRVL-off threshold DRVL to GND (2) 6 V V(DRVH) = 90% to 10%, No Load, CCM/ OOA (2) tD (2) kHz (2) 1 V 1 V Specified by design. Not production tested. Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s) :TPS51220A-Q1 TPS51220A-Q1 SLUSAI2 – MARCH 2011 www.ti.com ELECTRICAL CHARACTERISTICS (continued) over operating free-air temperature range, EN = 3.3V, VIN = 12V, V5SW = 5V (unless otherwise noted) PARAMETER TEST CONDITIONS MIN TYP MAX RTV package, TA = 0 to 105°C 28 31 35 RSN package , TA = 0 to 105°C 28 31 34 TA = –40 to 105°C 27 31 37 TA = 0 to 105°C 27 31 36 TA = –40 to 105°C 25 31 42 TA = 0 to 105°C 56 60 65 TA = –40 to 105°C 55 60 68 TA = 0 to 105°C 55 60 67 TA = –40 to 105°C 54 60 72 UNIT CURRENT SENSE TRIP=0V/ 2V, 2V