LM2630 datasheet(2/14 Pages) NSC

2 / 14 page

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales Office/

Distributors for availability and specifications.

Voltages from the indicated

pins to GND and PGND:

−0.3V to 31V

CBOOT

−0.3V to 36V

−0.3V to 31V

CSH, CSL

−0.3V to 7V

FPWM, SYNC

−0.3V to 10V

Power Dissipation (T

A =

70˚C), (Note 2)

720mW

Storage Temperature Range

−65˚C to +150˚C

Soldering Dwell Time,

Temperature (Note 3)

Wave

4 sec, 260˚C

Infrared

10 sec, 240˚C

Vapor Phase

75 sec, 219˚C

ESD Rating (Note 4)

1.5 kV

Operating Ratings

4.5V to 30V

Junction Temperature

−40˚C to +125˚C

Electrical Characteristics

Specifications in standard type face are for T

j = 25˚C and those with boldface type apply over full operating junction tem-

perature range. V

IN =10V, GND = PGND = 0V,unless otherwise stated. (Notes 5, 6)

Symbol

Parameter

Conditions

Typical

Limit

Units

System

Input Supply Voltage

4.5

V(min)

V(max)

OUT

Output Voltage Adjustment

Range

1.8

6.0

V(min)

V(max)

∆V

OUT/

OUT

Load Regulation

0 mV

≤ (CSH-CSL) ≤ 75 mV

0.3

∆V

OUT/

OUT

Line Regulation

4.5

≤ V

IN ≤ 30V

0.002

%/V

Input Supply Current with the

Switching Controller ON

FB = 1V, VCSH = 2.15V, VCSL =

2.1V

0.8

1.2/1.4

mA(max)

Input Supply Current with the

Switching Controller ON

(Internal Rail is Supplied

from CSL Pin)

FB = 1V, VCSH = 5.15V, VCSL =

0.15

Input Supply Current with the

IC Shut Down

SD = 0V, VIN = 30V

0.1

µA

3 (Note 7)

µA(max)

Minimum Output Voltage for

CSL Providing the Internal

Rail

Soft Start Source Current

SS = 1.5V

µA

µA(min)

µA(max)

Soft Start Sink Current

SS = 1.5V

µA

Current Limit Voltage

(Voltage from CSH to CSL)

FB = 1V, VCSL = 1.8V

110

90/80

mV(min)

130/140

mV(max)

IN Undervoltage Shutdown

Latch Threshold

Rising Edge

3.5

2.8

V(min)

OUT Undervoltage

Shutdown Latch Threshold

% V

OUT

% V

OUT(min)

OUT Low Regulation

Comparator Enable

Threshold

% V

OUT

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