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A6902D 数据表(PDF) 6 Page - STMicroelectronics

部件名 A6902D
功能描述  Up to 1A step down switching regulator with adjustable current limit for automotive applications
PDF  12 Pages
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制造商  STMICROELECTRONICS [STMicroelectronics]
网页  http://www.st.com
标志 STMICROELECTRONICS - STMicroelectronics

A6902D 数据表(HTML) 6 Page - STMicroelectronics

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A6902D
Electrical characteristics
6/12
4
Electrical characteristics
Table 4.
Electrical characteristics (TJ=-40 to 85°C, VCC = 12V, unless otherwise specified)
Symbol
Parameter
Test condition
Min
Typ
Max
Unit
VCC
Operating input voltage
range
V0=1.235V; I0=2A
8
36
V
RDS(on)
Mosfet on resistance
0.250
0.5
Ω
IL
Maximum limiting
current
VCC=8.5V
2
2.5
3.2
A
I0
Operating charging
current
Rsense=0.1Ω
0.92
1.08
A
fSW
Switching frequency
212
250
280
kHz
Duty cycle
0
100
%
Dynamic characteristics (see test circuit).
V5
Voltage feedback
8V<VCC<36V,
20mA<I0<1A
1.198
1.235
1.272
V
η
Efficiency
V0=5V, VCC=12V
90
%
DC characteristics
Iqop
Total operating
quiescent current
35
mA
Iq
Quiescent current
Duty cycle=0; VFB=1.5V
2.7
mA
Error amplifier
VOH
High level output voltage VFB=1V
3.6
V
VOL
Low level output voltage VFB=1.5V
0.4
V
Io source
Source output current
VCOMP = 1.9V;
VFB = 1V
190
300
µA
Io sink
Sink output current
VCOMP = 1.9V;
VFB = 1.5V
11.5
mA
Ib
Source bias current
2.5
4
µA
DC open loop gain
RL=
∞
50
58
dB
gm
Transconductance
ICOMP = -0.1mA to
0.1mA; VCOMP = 1.9V
2.3
mS
VOFFS
Input offset voltage
VCS- = 1.8V; VCS+ =
Vcomp
90
100
110
mV
ICS+
CS+ output current
I0 =1A; RSENSE
=100m
Ω;
VOUT<VCC-2V
1.5
3
µA
ICS-
CS- output current
I0 =1A; RSENSE
=100m
Ω;
VOUT<VCC-2V
1.5
3
µA



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