TPS56100

HIGH-EFFICIENCY DSP POWER SUPPLY CONTROLLER

FOR 5-V INPUT SYSTEMS

SLVS201A – JUNE 1999 – REVISED JULY 1999

11

POST OFFICE BOX 655303

electrical characteristics over recommended operating virtual junction temperature range,

high-side VDS sensing

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Gain

2

V/V

Initial accuracy

VHISENSE = 5 V,

VLOSENSE = 4.5 V

194

206

mV

IOUTLO

Sink current

VIOUTLO = 5 V

250

nA

IOUT

Source current

VIOUT = 0.5 V,

VHISENSE = 5 V,

VIOUTLO = 4.5 V

500

µA

IOUT

Sink current

VIOUT = 0.05 V, VHISENSE = 5 V,

VIOUTLO = 5 V

50

µA

Output voltage swing

VHISENSE = 4.5 V, RIOUT = 10 kΩ

0

1

V

Output voltage swing

VHISENSE = 3 V, RIOUT = 10 kΩ

0

0.75

V

LOSENSE

High-level input voltage

VHISENSE = 4 5 V (see Note 3)

2.85

V

LOSENSE

Low-level input voltage

VHISENSE = 4.5 V (see Note 3)

2.4

V

Sample/hold resistance

4.5 V

≤ VHISENSE ≤ 5.5 V,

LOSENSE connected to HISENSE,

VHISENSE – VIOUTLO = 0.15 V

62

85

123

Ω

Sample/hold resistance

3 V

≤ VHISENSE ≤ 3.6 V,

LOSENSE connected to HISENSE,

VHISENSE – VIOUTLO = 0.15 V

67

95

144

Ω

CMRR

VHISENSE = 5.5 V to 3 V,

VHISENSE – VOUTLO = 100 mV

62

65

dB

NOTE 3. This parameter is ensured by design and is not production tested.

inhibit

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Start threshold

1.85

2.1

2.35

V

Hysteresis

0.08

0.1

0.14

V

Stop threshold

1.76

V

overvoltage protection

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

Overvoltage trip threshold

112

115

120

%VREF

Hysteresis

See Note 3

10

mV

NOTE 3: This parameter is ensured by design and is not production tested.

overcurrent protection

PARAMETER

TEST CONDITIONS

MIN

TYP

MAX

UNIT

OCP trip threshold

80

100

125

mV

Input bias current

100

nA