1
Features
s
Two regulated outputs
12V 5.0%; 750mA
5V 2.0%; 100mA
s
Very low SLEEP mode
current drain 200nA
s
Fault Protection
Reverse Battery
+60V, -50V Peak
Transient Voltage
Short Circuit
Thermal Shutdown
s
CMOS Compatible
ENABLE
Package Options
5 Lead TO-220
Tab (Gnd)
1
CS8156
12V, 5V Low Dropout Dual Regulator
with ENABLE
CS8156
Description
V
IN
V
OUT
2
, 5V
Gnd
V
OUT
1
, 12V
ENABLE
+
-
Bandgap
Reference
+
-
+
-
Thermal
Shutdown
Over Voltage
Shutdown
Anti-Saturation
and
Current Limit
Anti-Saturation
and
Current Limit
Pre-Regulator
Block Diagram
Absolute Maximum Ratings
Input Voltage
Operating Range .....................................................................-0.5V to 26V
Peak Transient Voltage (Load Dump = 46V) ....................................60V
Internal Power Dissipation ..................................................Internally Limited
Operating Temperature Range................................................-40C to +125C
Junction Temperature Range...................................................-40C to +150C
Storage Temperature Range ....................................................-65C to +150C
Lead Temperature Soldering
Wave Solder (through hole styles only)..........10 sec. max, 260C peak
The CS8156 is a low dropout 12V/5V
dual output linear regulator. The 12V
5% output sources 750mA and the 5V
2.0% output sources 100mA.
The on board ENABLE function con-
trols the regulators two outputs. When
the ENABLE lead is low, the regulator
is placed in SLEEP mode. Both outputs
are disabled and the regulator draws
only 200nA of quiescent current.
The regulator is protected against over-
voltage conditions. Both outputs are
protected against short circuit and ther-
mal runaway conditions.
The CS8156 is packaged in a 5 lead
TO220 with copper tab. The copper
tab can be connected to a heat sink if
necessary.
1 V
I
N
2 V
OUT1
3 Gnd
4 ENABLE
5 V
OUT2
A Company
Rev. 2/19/98
Cherry Semiconductor Corporation
2000 South County Trail, East Greenwich, RI 02818
Tel: (401)885-3600 Fax: (401)885-5786
Email: info@cherry-semi.com
Web Site: www.cherry-semi.com
2
CS8156
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Package Lead Description
PACKAGE LEAD #
LEAD SYMBOL
FUNCTION
5 Lead TO-220
1
V
IN
Supply voltage, usually direct from battery.
2
V
OUT1
Regulated output 12V, 750mA (typ)
3
Gnd
Ground connection.
4
ENABLE
CMOS compatible input lead; switches outputs on and off.
When ENABLE is high V
OUT1
and V
OUT2
are active.
5
V
OUT2
Regulated output 5V, 100mA (typ).
Electrical Characteristics for V
OUT
: V
IN
= 14.5V, I
OUT1
= 5mA, I
OUT2
= 5mA, -40C T
J
+150C, -40C T
C
+125C
unless otherwise specified
s Output Stage(V
OUT1
)
Output Voltage, V
OUT1
13V V
IN
16V, I
OUT1
750mA
11.2
12.0
12.8
V
Dropout Voltage
I
OUT1
= 500mA
0.4
0.6
V
I
OUT1
= 750mA
0.6
1.0
V
Line Regulation
13V V
IN
16V ,5mA I
OUT
< 100mA
15
80
mV
Load Regulation
5mA I
OUT1
500mA
15
80
mV
Quiescent Current
I
OUT1
500mA, No Load on Standby
45
125
mA
I
OUT1
750mA, No Load on Standby
100
250
mA
Sleep Mode
ENABLE = Low
200
nA
Ripple Rejection
f = 120Hz, I
OUT
= 5mA,
42
70
dB
V
IN
= 1.5V
PP
at 15.5V
DC
Current Limit
0.75
1.20
2.50
A
Maximum Line Transient
V
OUT1
13V
60
90
V
Reverse Polarity
V
OUT1
-0.6V, 10 Load
-18
-30
V
Input Voltage, DC
Reverse Polarity Input
1% Duty Cycle, t = 100ms, V
OUT
-6V,
-50
-80
V
Voltage, Transient
10 Load
Output Noise Voltage
10Hz - 100kHz
500
Vrms
Output Impedance
500mA DC and 10mA rms, 100Hz
0.2
1.0
Over-voltage Shutdown
28
34
45
V
s Standby Output (V
OUT2
)
Output Voltage, (V
OUT2
)
9V V
IN
16V, 1mA I
OUT2
100mA
4.90
5.00
5.10
V
Dropout Voltage
I
OUT2
100mA
0.60
V
Line Regulation
6V V
IN
26V; 1mA I
OUT
100mA
5
50
mV
Load Regulation
1mA I
OUT2
100mA; 9V V
IN
16V
5
50
mV
Quiescent Current
V
OUT1
OFF, V
OUT2
OFF, V
ENABLE
= 0.8V
1
350
A
Ripple Rejection
f = 120Hz; I
OUT
= 100mA,
42
70
dB
V
IN
= 1.5V
PP
at 14.5V
DC
Current Limit
100
200
mA
s ENABLE Function (ENABLE)
Input ENABLE Threshold
V
OUT1
Off
1.25
0.80
V
V
OUT1
On
2.00
1.25
V
Input ENABLE Current
V
ENABLE
V
THRESHOLD
-10
0
10
A
3
Typical Performance Characteristics
CS8156
0
0
50
100
150
200
Dropout V
oltage (mV)
I
OUT
(mA)
200
400
600
800
1000
1200
1400
1600
1800
2000
Dropout Voltage vs I
OUT2
INPUT VOLTAGE (V)
OUTPUT
VOL
T
AGE (V)
7
6
5
4
3
2
1
0
-1
-2
-40
-20
0
20
40
60
8
9
10
11
12
13
R
L
=10
W
V
OUT1
vs. Input Voltage
-20
Temp (
C)
V
OUT
1
(V)
11.75
12.15
0
20
40
60
80
100 120 140 160
-40
12.10
12.05
12.00
11.95
11.90
11.85
11.80
V
OUT1
vs. Temperature
-20
5.020
Temp (
C)
V
OUT
2
(V)
5.010
5.000
4.990
4.980
4.970
5.030
0
20
40
60
80
100 120 140 160
-40
V
OUT2
vs. Temperature
V
ENABLE
(V)
I
ENABLE
(
m
A)
0
0
100
5
1
2
3
4
20
40
60
80
ENABLE Current vs. ENABLE Voltage
V
ENABLE
(V)
I
ENABLE
(mA)
0.0
0.0
5.0
25
4.0
3.0
2.0
1.0
5
10
15
20
ENABLE Current vs. ENABLE Voltage
4
CS8156
Typical Performance Characteristics: continued
20
10
0
-10
-20
3
2
1
0
TIME (
ms)
INPUT
VOL
T
AGE
CHANGE (V)
OUTPUT
VOL
T
AGE
DEVIA
TION (mV)
I
OUT1
= 500mA
0
10
20
30
40
50
60
Line Transient Response (V
OUT1
)
10
TIME (
ms)
INPUT
VOL
T
AGE
CHANGE (V)
OUTPUT
VOL
T
AGE
DEVIA
TION (mV)
5
0
-5
-10
3
2
1
0
0
10
20
30
40
50
60
I
OUT2
= 100mA
Line Transient Response (V
OUT2
)
150
TIME (
ms)
LOAD
CURRENT
(A)
OUTPUT
VOL
T
AGE
DEVIA
TION (mV)
100
50
0
-50
-100
-150
0.8
0.6
0.4
0.2
0
0
10
20
30
40
50
60
Load Transient Response (V
OUT1
)
150
TIME (
ms)
ST
ANDBY
LOAD
CURRENT
(mA)
ST
ANDBY
OUTPUT
VOL
T
AGE
DEVIA
TION (mV)
100
50
0
-50
-100
-150
20
15
10
5
0
0
10
20
30
40
50
60
Load Transient Response (V
OUT2
)
AMBIENT TEMPERATURE (
C)
POWER DISSIP
A
TION (W)
20
18
16
14
12
10
8
6
4
2
0
0
10
20
30
40
50
60
70
80
90
INFINITE
HEAT SINK
10
C/W HEAT SINK
NO HEAT SINK
Maximum Power Dissipation (TO-220)
150
140
130
120
110
90
80
70
60
50
40
30
20
10
100
0
100
200
300
400
500
600
700
800
125C
25C
-40C
No Load on 5V
V
IN
= 14V
0
Output Current (mA)
Quiescent Current (mA)
Quiescent Current vs Output Current for V
OUT2
5
Typical Performance Characteristics: continued
Output Current (mA)
Load Regulation (mV)
0
-35
100
0
800
-40
-30
-25
-20
-15
-10
-5
200
300
400
500
600
700
V
IN
= 14V
125C
25C
-40C
Output Current (mA)
Line Regulation (mV)
0
-35
100
25
800
-40
125C
25C
-40C
-30
-25
-20
-15
-10
-5
0
5
10
15
20
100
100
100
100
100
100
V
IN
= 13 - 26V
Output Current (mA)
Load Regulation (mV)
0
-16
10
0
20 30 40 50 60 70 80 90 100 110 120 130 140 150
-18
V
IN
= 14V
-40C
125C
25C
-14
-12
-10
-8
-6
-4
-2
Output Current (mA)
Line Regulation (mV)
0
-5
10
3
20 30 40 50 60 70 80 90 100 110 120 130 140 150
-6
-40C
125C
25C
-4
-3
-2
-1
0
1
2
V
IN
= 6 - 26V
Output Current (mA)
Quiescent Current (mA)
0
2
10
4
6
8
10
12
14
16
18
20
22
20 30 40 50 60 70 80 90 100 110 120 130 140 150
0
No Load On 12V
V
IN
= 14V
-40C
125C
25C
Quiescent Current vs Output Current for V
OUT1
CS8156
Line Regulation vs Output Current for V
OUT1
Line Regulation vs Output Current for V
OUT2
Load Regulation vs Output Current for V
OUT1
Load Regulation vs Output Current for V
OUT2
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