參數(shù)資料
型號(hào)： 8178
廠商： Allegro MicroSystems, Inc.
英文描述： LOW-DROPOUT, 7.7 V PREREGULATOR
中文描述： 低壓差，7.7 V前置穩(wěn)壓器
文件頁(yè)數(shù)： 2/4頁(yè)
文件大?。?/td> 49K
代理商： 8178
8178
LOW-DROPOUT,
7.7 V PREREGULATOR
115 Northeast Cutoff, Box 15036
Worcester, Massachusetts 01615-0036 (508) 853-5000
Copyright 1996 Allegro MicroSystems, Inc.
ELECTRICAL CHARACTERISTICS over operating temperature range.
Limits
Characteristic
Symbol
Test Conditions
Min.
Typ.
Max.
Units
Output Voltage
V
O
6.9 V
≤
V
I
≤
24 V
6.5
7.7
8.8
V
2.5 V
≤
V
I
≤
6.9 V
V
I
- 0.4
—
—
V
V
I
= 120 V, pulse test
—
—
11
V
Output Volt. Temp. Coeff.
α
VO
—
—
TBD
mV/
°
C
Line Regulation
V
O(
VI)
—
—
TBD
mV
Load Regulation
V
O(
IO)
—
—
TBD
mV
Quiescent Current
I
Q
V
I
= 13.5 V, I
O
= 0
—
—
2.5
mA
2.5 V
≤
V
I
≤
8 V, I
O
= 0
—
—
5.6
mA
Power Dissipation
P
d
V
I
= 13.5 V, I
O
= 15 mA
—
—
130
mW
Thermal Resistance*
R
θ
JA
A8178LLR
—
575
—
°
C/W
A8178LLT
—
200
—
°
C/W
Typical values are at T
A
= +25
°
C and are given for circuit design information only.
*
Mounted on 2.24" x 2.24" solder-coated copper-clad board in still air.
INTERNAL PROTECTIVE FEATURES
ISO
Pulse No.
Test
Test Conditions (at T
A
= +25
°
C)
V
S
= -100 V, R
S
= 10
, t
r
= 1
μ
s, t
d
= 2 ms
1
Inductive Turn Off (Negative)
2
Inductive Turn Off (Positive)
V
S
= 100 V, R
S
= 10
, t
r
= 1
μ
s, t
d
= 50
μ
s, non-operating
3a
Capacitive/Inductive Coupling (Neg)
V
S
= -150 V, R
S
= 50
, t
r
= 50 ns, t
d
= 100 ns
3b
Capacitive/Inductive Coupling (Pos)
V
S
= 100 V, R
S
= 50
, t
r
= 50 ns, t
d
= 100 ns
4
Reverse Battery
V
S
= -14 V, t
d
= 20 s, non-operating
5
Load Dump
V
S
= 86.5 V, R
S
= 0.5
, t
r
= 5 ms, t
d
= 400 ms
6
Ignition Coil Disconnect
EXTERNAL PROTECTION REQ’D
V
S
= -300 V, R
S
= 30
, t
r
= 60
μ
s, t
d
= 300
μ
s
7
Field Decay (Negative)
V
S
= -80 V, R
S
= 10
, t
r
= 5 ms, t
d
= 100 ms
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