參數(shù)資料
型號(hào)： LP5551
廠商： National Semiconductor Corporation
英文描述： PowerWise⑩ Technology Compliant Energy Management Unit
中文描述： ⑩技術(shù)兼容的PowerWise能源管理單元
文件頁數(shù)： 8/32頁
文件大小： 3081K
代理商： LP5551
Symbol
Δ
V
OUT
Parameter
Line Regulation
Conditions
3.6 V
≤
V
DD_A, _D
, V
PVDD1,2
≤
5.5 V,
I
OUT
= 125 mA
V
IN
= 3.6 V, 1 mA
≤
I
OUT
≤
250 mA
3.6 V
≤
V
DD_A, _D
, V
PVDD1,2
≤
3.9 V,
T
RISE,FALL
= 10 us
V
DD_A, _D
, V
PVDD1,2
= 3.6 V,
25 mA
≤
I
OUT
≤
225 mA,
T
RISE,FALL
= 100 ns
10 Hz
≤
f
≤
100 kHz,
C
OUT
= 4.7 μF
f = 1 kHz,
C
OUT
= 4.7 μF
f = 10 kHz,
C
OUT
= 4.7 μF
0 mA
≤
I
OUT
≤
250 mA
Min
-0.081
Typ
Max
0.306
Units
%/V
Load Regulation
-0.018
0.018
%/mA
Line Transient Regulation
24
mV
Load Transient Regulation
246
mV
eN
Output Noise Voltage
0.120
mVRM
S
PSRR
Power Supply Ripple Rejection
Ratio
46
dB
34
C
OUT
Output Capacitance
Output Capacitor ESR
2
5
4.7
20
500
μF
m
μs
t
START-UP
Start-Up Time from Shut-down
C
OUT
= 4.7 μF, I
OUT
= 250 mA
144
AVS/DVS Switcher Characteristics
3.6V. Typical values and limits appearing in normal type apply for TJ = 25°C. Limits appearing in boldface type apply over the
entire junction temperature range for operation, -40 to +125°C. (Notes 2, 7, 8)
Unless otherwise noted, V
DD_A, _D
, V
PVDD1,2
, RESETN, ENABLE =
Symbol
V
OUT
Accuracy Output Voltage
Parameter
Conditions
I
OUT
= 200 mA, V
OUT
= 1.2 V,
V
DD_A, _D
, V
PVDD1,2
= 3.6 V
Programming Resolution = 4.7 mV
Min
-4.1%
Typ
1.2
Max
4.3%
Units
V
V
OUT
Range
Programmable Output Voltage
Range
Line regulation
0.6
1.2
1.2
V
Δ
V
OUT
2.7V < V
DD_A, _D
, V
PVDD1,2
<5.5 V,
I
OUT
= 10 mA
V
DD_A, _D
, V
PVDD1,2
= 3.6 V
I
OUT
= 100-300 mA
0.18
%/V
Load regulation
0.011
%/mA
I
Q
R
DSON(P)
R
DSON(N)
I
LIM
f
OSC
C
OUT
Quiescent current consumption I
OUT
= 0 mA
P-FET resistance
15
μA
m
m
mA
V
DD_A, _D
, V
PVDD1,2
= VGS = 3.6 V
V
DD_A, _D
, V
PVDD1,2
= VGS = 3.6 V
2.7 V < V
DD_A, _D
<5.5 V
PWM-mode
0 mA
≤
I
OUT
≤
300 mA
425
690
N-FET resistance
345
635
Switch peak current limit
350
805
520
750
1125
Internal oscillator frequency
1000
kHz
Output Capacitance
Output Capacitor ESR
22
μF
m
μH
5
500
L
Inductor inductance
0 mA
≤
I
OUT
≤
300 mA
4.7
R
VFB
V
FB
pin resistance to ground
150
440
k
www.national.com
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