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4 48 Buck function: BuckA and BuckB Phase inputs: PHA, PHB C0.6

40 V voltage Current-sense voltage: SA1, SA2, SB1, SB2

0 11 Power-good output: PGA, PGB

0 11 SYNC, EXTSUP

0 9 Enable input: ENC

0 9 Boost function Voltage sense: DS

40 V DIV

0 VREG Operating Temperature: TA C40

125 °C Copyright ? 2013, Texas Instruments Incorporated Submit Documentation Feedback

3 Product Folder Links: TPS43337-Q1 TPS43337-Q1 SLVSBC2A CAUGUST 2013CREVISED SEPTEMBER

2013 www.ti.com DC ELECTRICAL CHARACTERISTICS VIN =

8 to

18 V, TJ = C40°C to +150°C (unless otherwise noted) NO. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 1.0 Input Supply Boost controller enabled, after initial start-up 1.1 VBAT Supply voltage

2 40 V condition is satisfied Input voltage required for device 6.5

40 on initial start-up 1.2 VIN V Buck regulator operating range

4 40 after initial start-up VIN falling. After a reset, initial start-up conditions 3.5 3.6 3.8 V may apply.(1) 1.3 VIN UV Buck undervoltage lockout VIN rising. After a reset, initial start-up conditions 3.8

4 V may apply.(1) 1.4 VBOOST_UNLOCK Boost unlock threshold VBAT rising 8.2 8.5 8.8 V VIN =

13 V, BuckA: LPM, BuckB: off, TA = 25°C

34 46 ?A LPM quiescent current: 1.5 IQ_LPM VIN =

13 V, BuckB: LPM, BuckA: off, TA = 25°C (2) VIN =

13 V, BuckA, B: LPM, TA = 25°C

43 57 ?A VIN =

13 V, BuckA: LPM, BuckB: off, TA = 125°C

44 56 ?A LPM quiescent current: 1.6 IQ_LPM VIN =

13 V, BuckB: LPM, BuckA: off, TA = 125°C (2) VIN =

13 V, BuckA and BuckB: LPM, TA = 125°C

53 67 ?A SYNC =

5 V, TA = 25°C VIN =

13 V, BuckA: CCM, BuckB: off, TA = 25°C 4.85 5.3 Quiescent current: 1.7 IQ_NRM mA normal (PWM) mode(2) VIN =

13 V, BuckB: CCM, BuckA: off, TA = 25°C VIN =

13 V, BuckA and BuckB: CCM, TA = 25°C

7 7.6 SYNC =

5 V, TA = 125°C VIN =

13 V, BuckA: CCM, BuckB: off, TA = 125°C

5 5.5 Quiescent current: 1.8 IQ_NRM mA normal (PWM) mode(2) VIN =

13 V, BuckB: CCM, BuckA: off, TA = 125°C VIN =

13 V, BuckA, B: CCM, TA = 125°C 7.5

8 1.9 Ibat_sh Shutdown current BuckA and BuckB: off, VBat =

13 V , TA = 25°C 2.5

4 ?A 1.10 Ibat_sh Shutdown current BuckA and BuckB: off, VBat =

13 V, TA = 125°C

3 5 ?A 1.11 VINLPMexit VIN level to exit LPM VIN falling 7.7

8 8.3 V 1.12 VINLPMentry VIN level to enable entering LPM VIN rising 8.2 8.5 8.8 V 1.13 VINLPMhys Hysteresis VIN rising or falling 0.4 0.5 0.6 V 2.0 Input Voltage VBAT - Undervoltage Lockout VBAT falling. After a reset, initial start-up conditions 1.8 1.9

2 V may apply.(1) 2.1 VBATUV Boost-input undervoltage VBAT rising. After a reset, initial start-up conditions 2.4 2.5 2.6 V may apply.(1) 2.2 UVLOHys Hysteresis

500 600

700 mV 2.3 UVLOfilter Filter time

5 ?s 3.0 Input Voltage VIN - Overvoltage Lockout VIN rising

45 46

47 3.1 VOVLO Overvoltage shutdown V VIN falling

43 44

45 3.2 OVLOHys Hysteresis

1 2

3 V 3.3 OVLOfilter Filter time

5 ?s (1) If VBAT and VREG remain adequate, the buck can continue to operate if VIN is >

3.8 V. (2) Quiescent current specification includes the current in the internal-feedback resistor divider.

4 Submit Documentation Feedback Copyright ? 2013, Texas Instruments Incorporated Product Folder Links: TPS43337-Q1 TPS43337-Q1 www.ti.com SLVSBC2A CAUGUST 2013CREVISED SEPTEMBER

2013 DC ELECTRICAL CHARACTERISTICS (continued) VIN =

8 to

18 V, TJ = C40°C to +150°C (unless otherwise noted) NO. PARAMETER TEST CONDITIONS MIN TYP MAX UNIT 4.0 Boost Controller 4.1 Vboost7-VIN Boost VOUT =

7 V DIV = low, VBAT =