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參數資料
| 型號： | ADP3171 |
| 廠商： | Analog Devices, Inc. |
| 英文描述： | Charger front end protection IC with 30V max Vin and 4.5V LDO output 8-WSON 0 to 125 |
| 中文描述： | 同步降壓控制器，配有雙線性穩壓器控制器 |
| 文件頁數： | 2/12頁 |
| 文件大小： | 310K |
| 代理商： | ADP3171 |
REV. 0
–2–
ADP3171–SPECIFICATIONS
1
(V
CC
= 12 V, T
A
= 0 C to 70 C, unless otherwise noted.)
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
FEEDBACK INPUT
Output Accuracy
Line Regulation
Crowbar Trip Point
Crowbar Reset Point
Crowbar Response Time
V
FB
V
OUT
V
CROWBAR
Figure 1
VCC = 10 V to 14 V
% of Nominal FB Voltage
% of Nominal FB Voltage
Overvoltage to DRVL Going High
1.188 1.2
1.212
V
%
%
%
ns
0.06
120
50
400
115
40
125
60
t
CROWBAR
OSCILLATOR
Off Time
CT Charge Current
T
A
= 25
°
C, CT = 200 pF
T
A
= 25
°
C, V
OUT
in Regulation
T
A
= 25
°
C, V
OUT
= 0 V
3.5
130
25
4
150
35
4.5
170
45
μ
s
μ
A
μ
A
I
CT
ERROR AMPLIFIER
Output Resistance
Transconductance
Output Current
Maximum Output Voltage
Output Disable Threshold
–3 dB Bandwidth
R
O(ERR)
g
m(ERR)
I
O(ERR)
V
COMP(MAX)
V
COMP(OFF)
BW
ERR
130
2.2
625
3.0
750
500
k
mmho
μ
A
V
mV
kHz
2.05
2.35
FB Forced to V
OUT
– 3%
FB Forced to V
OUT
– 3%
600
900
COMP = Open
CURRENT SENSE
Threshold Voltage
V
CS(TH)
FB Forced to V
OUT
– 3%
FB
≤
0.45 V
0.8 V
≤
COMP
≤
1 V
CS+ = CS– = V
OUT
CS+ – (CS–)
>
87 mV
to DRVH Going Low
69
35
78
45
1
0.5
50
87
54
5
5
mV
mV
mV
μ
A
ns
Input Bias Current
Response Time
I
CS+
, I
CS–
t
CS
OUTPUT DRIVERS
Output Resistance
Output Transition Time
R
O(DRV(X))
t
R
, t
F
I
L
= 50 mA
C
L
= 3000 pF
6
80
ns
LINEAR REGULATORS
Feedback Current
LR1 Feedback Voltage
LR2 Feedback Voltage
Driver Output Voltage
I
LRFB(X)
V
LRFB(1)
V
LRFB(2)
V
LRDRV(X)
0.3
1.5
1.8
1
1.55
1.85
μ
A
V
V
V
Figure 2, VCC = 4.5 V to 12.6 V
Figure 2, VCC = 4.5 V to 12.6 V
VCC = 4.5 V, V
LRFB(X)
= 0 V
1.45
1.75
4.2
POWER GOOD COMPARATOR
Undervoltage Threshold
Undervoltage Hysteresis
Overvoltage Threshold
Overvoltage Reset Point
Output Voltage Low
Response Time
V
PWRGD(UV)
% of Nominal FB Voltage
% of Nominal FB Voltage
% of Nominal FB Voltage
% of Nominal FB Voltage
I
PWRGD(SINK)
= 1 mA
75
80
5
120
50
250
250
85
%
%
%
%
mV
ns
V
PWRGD(OV)
115
40
125
60
500
V
OL(PWRGD)
SUPPLY
DC Supply Current
2
UVLO Threshold Voltage
UVLO Hysteresis
I
CC
V
UVLO
7
7
1
9
7.25
1.2
mA
V
V
6.75
0.8
NOTES
1
All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control (SQC).
2
Dynamic supply current is higher due to the gate charge being delivered to the external MOSFETs.
Specifications subject to change without notice.
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