TPS5615, TPS5618, TPS5625, TPS5633

SYNCHRONOUS-BUCK HYSTERETIC REGULATOR CONTROLLER

SLVS177A – SEPTEMBER 1998 – REVISED NOVEMBER 1998

8

POST OFFICE BOX 655303

recommended operating conditions

MIN

MAX

UNIT

Supply voltage, VCC

11.4

13

V

BOOT to DRVGND

0

28

BOOT to BOOTLO

0

13

Input voltage

INHIBIT, LODRV, PWRGD, OCP

0

6

V

LOHIB, LOSENSE, IOUTLO, HISENSE

0

13

VSENSE

0

4.5

Voltage difference between ANAGND and DRVGND

0

±0.2

V

Output current, VREFB†

0

0.4

mA

† Not recommended to load VREFB other than to set hysteresis since IVREFB sets slowstart time.

electrical characteristics over recommended operating virtual junction temperature range,

reference

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

TPS5615

1.485

1.515

VREF

Reference

TPS5618

VCC =11 4Vto12 6 V

1.782

1.818

V

VREF

Reference

voltage

TPS5625

VCC = 11.4 V to 12.6 V

2.475

2.525

V

TPS5633

3.267

3.333

VREFB

Output voltage

IREFB = 50 µA

VREF–2%

VREF

VREF+2%

V

VREFB

Output regulation

10

µA ≤ IO ≤ 500 µA

2

mV

power good

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Undervoltage trip threshold

90

93

95

%VREF

Low-level output voltage, PWRGD

IO = 5 mA

0.5

0.75

V

High-level input current, PWRGD

VPWRGD = 6 V

1

µA

Hysteresis

10

mV

overvoltage protection

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Overvoltage trip threshold

112

115

120

%VREF

Hysteresis

See Note 2

10

mV

NOTE 2: Ensured by design, not tested.

slowstart

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Charge current

VSLOWST = 0.5 V,

IVREFB = 65 µA

10.4

13

15.6

µA

Discharge current

VSOFTST = 1 V

3

mA

Comparator input offset voltage

10

mV

Comparator input bias current

See Note 2

10

100

nA

Hysteresis

–7.5

7.5

mV

NOTE 2: Ensured by design, not tested.