TPS65708

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SLVSAE1A

– OCTOBER 2010 – REVISED FEBRUARY 2011

RECOMMENDED OPERATING CONDITIONS

Over operating free-air temperature range (unless otherwise noted).

MIN

NOM

MAX

UNIT

Input voltage range for step-down converter DCDC1and DCDC2

3.6

6

V

Output voltage range for DCDC1 and DCDC2 step-down converter

0.8

3.3

V

DC output current at L1 or L2

400

mA

L

1

1.5

2.2

µH

Input voltage range for LDO1

1.7

6

V

Output voltage range for LDO1 and LDO2

0.8

3.3

V

Input voltage range for LDO2

1.7

6

V

Output current at LDO1 or LDO2

200

mA

4.7

µF

4.7

10

22

µF

2.2

µF

Operating ambient temperature

–40

85

°C

Operating junction temperature

–40

125

°C

(1)

To support a typical inductor value of 1.5

µH, the minimum inductance can go as low as 1.0µH. It is not recommended to use a 1µH

labeled inductor as the inductance will drop significantly below 1

µH in operation due to initial tolerances and saturation.

ELECTRICAL CHARACTERISTICS

Unless otherwise noted: VIN1 = VIN2 = VCC = 5V, L = 1.5

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

SUPPLY CURRENT

DCDC1, DCDC2, LDO1 and LDO2 enabled,

140

200

μA

ISINK in standby for PWM = 0

DCDC1, DCDC2, LDO1 and LDO2 enabled,

Operating quiescent current DCDCx and

4

mA

ISINK in standby if PWM = 0;

LDOx

Not including inductor losses

DCDC1, DCDC2, LDO1 and LDO2 enabled,

170

μA

ISINK in standby PWM = 0;

During power-up sequencing

DCDCx, LDOx and ISINK disabled;

Shutdown Current

6

15

μA

VCC

< 1.8V

DIGITAL PINS ( MODE)

High Level Input Voltage for MODE

1.2

V

Low Level Input Voltage for MODE

0

0.4

V

Input Leakage Current

MODE tied to GND or VIN1 / VIN2

0.01

0.1

μA

UNDERVOLTAGE LOCKOUT (UVLO), SENSED AT PIN VCC

Internal undervoltage lockout threshold

VCC, VIN1, VIN2 rising

3.5

3.6

3.7

V

UVLO

Internal undervoltage lockout threshold

VCC, VIN1, VIN2 falling

130

mV

hysteresis

STEP-DOWN CONVERTERS

VIN1

Input voltage for DCDC1

3.5

6

V

VIN2

Input voltage for DCDC2

3.5

6

V

POWER SWITCH

High side MOSFET on-resistance

VIN1 / VIN2 = 3.6V

250

400

m

Ω

Low side MOSFET on-resistance

VIN1 / VIN2 = 3.6V

150

300

m

Ω

Forward current limit

3.6V

≤ VIN1 / VIN2 ≤ 6V

650

820

1050

mA

DC output current

VIN1 / VIN2

> 3.5V , L = 1.5µH

400

mA

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