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参数资料
| 型号： | LM2645MTD/NOPB |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 335 kHz SWITCHING FREQ-MAX, PDSO48 |
| 封装： | TSSOP-48 |
| 文件页数： | 20/20页 |
| 文件大小： | 911K |
| 代理商： | LM2645MTD/NOPB |
Electrical Characteristics (Continued)
Unless otherwise specified, V
IN = 15V, SGND = PGND = 0V, VLIN5 = VDD1 = VDD2. Limits appearing in boldface type apply
over the entire operating junction temperature range, 0C to +125C. Specifications appearing in plain type are measured using
low duty cycle pulse testing with T
A = 25C (Note 5), (Note 6). Min/Max limits are guaranteed by design, test, or statistical
analysis.
Symbol
Parameter
Conditions
Min
Typ
Max
Units
SYSTEM
V
UVP
FB1_FIX, FB2_FIX,
LDOFB Undervoltage
Protection Latch
Threshold
As a Percentage of nominal output
voltage (Falling edge)
73
80
90
%
Hysteresis
4%
V
UV_DELAY
UV_DELAY Threshold
Voltage
2.3
V
I
UV_DELAY
UV_DELAY source
current
V
UV_DELAY =2V
5A
V
OVP
V
OUTx Overvoltage
Protection Latch
Threshold
As a percentage measured at
FB1_FIX, FB2_FIX
106
110
119
%
TH
LREG
V
OUTx Low Regulation
Comparator Enable
Threshold for channels 1
and 2
Falling Edge
95
%
HYS
LREG
Hysteresis of Low
Regulation Comparator
As a Percentage of output voltage
3%
V
pwrbad
Regulator Window
Detector Thresholds
(PGOOD from High to
Low) (Note 11)
As a Percentage of output voltage
86
91
94
%
V
pwrgd
Regulator Window
Detector Thresholds
(PGOOD from Low to
High)
As a Percentage of output voltage
92.5
94
96.5
%
TH
VOX_DIS
VO1, VO2 Quick
Discharge Threshold
0.8
V
ox_R
VO1,VO2
ON-Resistance
VO1=VO2=2V
200
Gate Drive
I
CBOOT
CBOOT Leakage
Current
V
CBOOT1 =VCBOOT2 =7V
100
nA
I
SC_DRV
HDRVx and LDRVx
Source Current
V
CBOOT1 =VCBOOT2 = 5V, VSWx=0V,
HDRVx=LDRVx=2.5V
0.8
A
I
sk_HDRV
HDRVx Sink Current
V
CBOOTx = VDDx = 5V, VSWx = 0V,
HDRVX = 2.5V
1.3
A
I
sk_LDRV
LDRVx Sink Current
V
CBOOTx = VDDx = 5V, VSWx = 0V,
LDRVX = 2.5V
2.5
A
R
HDRV
HDRV1 & 2 Source
On-Resistance
V
CBOOT1 =VCBOOT2 = 5V,
V
SW1 =VSW2 =0V
2.2
HDRV1 & 2 Sink
On-Resistance
1.1
R
LDRV
LDRV1 & 2 Source
On-Resistance
V
CBOOT1 =VCBOOT2 = 5V,
V
SW1 =VSW2 =0V
2.2
LDRV1 & 2 Sink
On-Resistance
0.65
LM2645
www.national.com
9
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