LM2630 datasheet(3/14 Pages) NSC

tên linh kiện	LM2630

Giải thích chi tiết về linh kiện	Synchronous Step-Down Power Supply Controller

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Electrical Characteristics (Continued)

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

Hysteresis of Low Regulation

Comparator

2

% V

OUT

Regulator Window Detector

Thresholds (PGOOD from

High to Low)

91 or 109

% V

OUT

Regulator Window Detector

Thresholds (PGOOD from

Low to High)

97 or 103

% V

OUT

Gate Drive

V

BOOT

Bootstrap Voltage (Voltage

from CBOOT to SW)

CBOOT Sourcing 100 µA

4.5

V

4.0

V(min)

I

BOOT

CBOOT Leakage Current

V

CBOOT = 7V

100

nA

High Drive Source Current

V

HDRV = 0V, VCBOOT = 5V

0.3

A

High Drive Sink Current

HDRV Forced to 5V

0.45

A

Low Drive Source Current

LDRV Forced to 0V

0.35

A

Low Drive Sink Current

LDRV Forced to 5V

0.55

A

High-Side FET

On-Resistance HDRV or

LDRV

8

Ω

Low-Side FET

On-Resistance HDRV or

LDRV

4

Ω

Oscillator

F

OSC

Oscillator Frequency

FADJ Open

200

kHz

172/162

kHz(min)

228/230

kHz(max)

Oscillator Frequency

FADJ Sourcing 2.94 µA (Note 8)

300

kHz

255

kHz(min)

345

kHz(max)

V

FADJ

Voltage at FADJ pin

1.03

V

D

MAX

Maximum Duty Cycle

FADJ Open

96

%

92

%(min)

Maximum Frequency of

Synchronization

Low-Going 200 ns Wide

Rectangular Pulses Applied at

400 kHz at the SYNC Input

400

kHz(min)

Minimum Pulse Width of the

SYNC Signal

SYNC Pulses are Low-Going

200

ns(min)

Error Amplifier

I

FB

Feedback Input Bias Current

V

FB = 1.3V, VCSH = 5.15V, VCSL

= 5V

100

nA

I

COMP

COMP Output Source

Current

V

COMP = 0.2V, VFB = 1V

50

µA

COMP Output Sink Current

V

COMP = 1.2V, VFB = 1.4V

50

µA

Voltage Reference

V

REF

Reference Voltage

(Nominal))

I

REF = 0µA

1.238

V

1.213/1.208

V(min)

1.263/1.268

V(max)

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Số phần tương tự - LM2630

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National Semiconductor ...	LM2631	265Kb / 12P	Synchronous Step-Down Power Supply Controller
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