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LM2630 Datasheet(PDF) 3 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LM2630
Description  Synchronous Step-Down Power Supply Controller
PDF  14 Pages
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2630 Datasheet(HTML) 3 Page - National Semiconductor (TI)

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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)
www.national.com
3



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