LM2633

SNVS139D – AUGUST 2000 – REVISED MAY 2013

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ELECTRICAL CHARACTERISTICS

Symbol

Parameter

Conditions

Min

Max

Units

SYSTEM

Channel 1 Load

0

mV

VID4:0=01101

Channel 2 Load

1.5

mV

Line Regulation (for the two

5.0V

≤ VIN ≤ 30V, VID4:0=01101

2

mV

switching regulators)

Input Supply Current with

(3)

1.5

2.4

mA

the Switching Channels ON

Input Supply Current with

(4)

10

18

µA

the IC Shut Down

VLIN5 Output Voltage

4.7

5.0

5.3

V

ILIM1 and ILIM2 Pins Sink

8

10

12

µA

Current

Negative Current Limit

45

mV

(SWx vs PGNDx voltage)

Soft Start Charge Current

0.5

2.25

5

µA

Soft Start Sink Current

In UVLO or thermal shutdown

2

µA

Soft Start ON Threshold

1.2

V

Soft Start Timeout

3.5

V

Threshold

UV_DELAY Threshold

2.1

V

UV_DELAY Source Current

1.0

5

9.0

µA

VID4:0 Internal Pull Up

6

13

µA

Current

VIN Under-voltage Lockout

Rising Edge

4.2

4.5

V

(UVLO) Threshold

VIN UVLO Hysteresis

300

mV

voltage Shutdown Latch

VID4:0 = 01100

73

80

83

Threshold(Measured at the

FB1)

Undervoltage Shutdown

VID4:0 = 01100

76

80

86

Latch Threshold (Measured

at the FB2 and FB3)

Shutdown Latch Threshold

110

114

119

for Channel 1 (Measured at

the FB1)

Shutdown Latch Threshold

109

112

115

for Channel 2 (Measured at

the FB2)

Comparator Enable

91.5

Threshold for Channels 1

and 2

(1)

(2)

This test simulates heavy load condition by changing COMP pin voltage.

(3)

This parameter indicates how much current the LM2633 is drawing from the input supply when it is functioning but not driving external

MOSFETs or a bipoloar transistor.

(4)

This parameter indicates how much current the LM2633 is drawing from the input supply when it is completely shut off.

(5)

When ON/SS1,2 pins are charged above this voltage, the under voltage protection feature is enabled.

(6)

Above this voltage, the under-voltage protection is enabled.

10

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