SECOS SSC2129

SSC2129
CMOS Low Dropout
Elektronische Bauelemente
Voltage Regulator
RoHS Compliant Product
Description
The SSC2129 series positive,linear regulators feature low quiescent
current (45µA typ.) with low dropout voltage, making them ideal
for battery applications. Output voltage are set at the factory and
trimmed to 1.5% accuracy.These rugged devices have both
Thermal Shutdown and Current Fold-back to prevent device failure
under the "Worst" of operating conditions. In applications requiring a
low noise, regulated supply, place a 1000pF capacitor between Bypass
and Ground.The SSC2129 is stable with an output capacitance of
4.7µF or greater.
Features
* Low Temperature Coefficient
* Over-Temperature Shutdown
* Highly Accurate ± 1.5%
* Very Low Dropout Voltage
* Noise Reduction Bypass Capacitor
* Guaranteed 1.55A Output
REF.
A
B
C
D
E
F
Millimeter
Min.
Max.
5.80
4.80
3.80
0
0.40
0.19
6.20
5.00
4.00
8
0.90
0.25
REF.
M
H
L
J
K
G
Millimeter
Min.
Max.
0.10
0.25
0.35
0.49
1.35
1.75
0.375 REF.
45
1.27 TYP.
* Current Limiting
* Power-Saving Shutdown Mode
Applications
* PC Peripherals
* Wireless Devices
* Portable Electronics
* Battery Powered Widgets
* Instrumentation
Functional Block Diagram
Typical Application Circuit
SSC2129
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 1 of 6
SSC2129
CMOS Low Dropout
Elektronische Bauelemente
Voltage Regulator
Absolute Maximum Ratings
Parameter
Ratings
Symbol
Unit
Input Voltage
VIN
8
Output Current
IOUT
PD/(VIN-VO)
A
Output Voltage
VOUT
Topr
1.5~5.0
V
Operating Ambient Temperature
Tj
Junction Temperature
Thermal Resistance
Power Dissipation (
o
T=100 C)*
PD
2.5
B
o
Output Voltage
1
VOUT (E)
Min.
-1.5%
Typ.
2
VOUT (T)
Output Current
IO
1.55
_
Current Limit
ILIM
1.55
2
REGLOAD
-1
0.2
Load Regulation
Dropout Voltage
Ground Pin Cruuent
Line Regulation
IO=1mA~1.5A
IGND
TC
Note3
_
_
PSRR
0.02
0.1
_
150
30
_
50
20
15
75
55
30
_
_
_
_
30
VEH
2
_
VEL
0
eN
IEH
IEL
ISD
_
_
_
_
_
_
_
_
0.15
30
_
800
_
_
_
Shutdown Supply Current
%
1
1000
70
OTH
EN Input Bias Current
VOUT >1.2V
VOUT >1.2V
45
Over Temperature Hystersis
Output Voltage
Temperature Coefficient
EN Input Threshold
A
_
OTS
Output Voltage Noise
A
_
_
Over Temperature Shutdown
Power Supply Rejection
IO=1mA
IQ
VIN
30
0.5
=VOUT(T)+2V,VEN=VIN )
V
_
600
_
W
1.5%
_
_
IN
C
C /W
Condition
_
45
o
o
Unit
_
REGLIN E
Input Voltage
_
C
C
Max.
_
VDROPOUT
Quiescent Current
_
-40~+125
20**
Electrical Characteristics Ta=25 C unless otherwise noted (V
Symbol
o
o
θjc
EDS Classification
*Assuming a heat sink capable of twice times (θjc)
**Estimated
Parameter
-40~+85
150
Tj Max.
Max. Junction Temperature
V
7
mV
2.8V< VOUT(T)
uA
V
_
o
C
C
o
ppm/ C
_
f=1kHz
f=10kHz
_
_
_
dB
_
_
_
VIN
0.4
0.1
0.5
uVrms
V
uA
_
2
Vo=VOUT(E)-2%
IO=1mA~1.5A
Io=1mA
VOUT(T)< 2.0V
VIN=VOUT(T)+ 1
2.0V ≤ VOUT(T)
to VOUT(T)+2
%
o
IO=1.55A
Io=0mA
uA
_
_
1.5V< VOUT(T)≤ 2.0V
2.0V< VOUT(T)≤ 2.8V
uA
Io=100mA
Co=4.7uF
( c e r a m ic )
f=100kHz
f=1kHz
Io=100mA
Co=4.7uF( ce ra mi c )
f=10kHz
CBYP=0.01uF
f=100kHz
f=10Hz~100kHz
CBYP=0uF
Io=10mA
CBYP=0.01uF
CO=4.7uF
VIN=2.7V~7V
VEN=VIN,VIN=2.7V~7V
VEN=0V, VIN=2.7V~7V
VIN=5V,VO =0V,VEN<VEL
VIN=2.5V,VO =0V,VEN<VEL
.
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 2 of 6
SSC2129
CMOS Low Dropout
Elektronische Bauelemente
Voltage Regulator
Note 1: VOUT (E) =Effective Output Voltage (i e. the output voltage when "VOUT (T) +2.0V" is provided at the VIN pin while maintaining a
certain IOUT value).
2: VOUT (T) =Specified Output Voltage
3: VIN (MIN) =VOUT+V DROPOUT
Ordering Information(contd.)
Part Number
SSC2129-15
SSC2129-25
SSC2129-47
Marking
9B152
XXXX
9B252
XXXX
9B472
XXXX
Output Voltage
Part Number
1.5V
SSC2129-18
2.5V
SSC2129-33
4.75V
SSC2129-50
Marking
Output Voltage
9B182
XXXX
9B332
XXXX
9B502
XXXX
1.8V
3.3V
5.0V
Characteristics Curve
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 3 of 6
SSC2129
Elektronische Bauelemente
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
CMOS Low Dropout
Voltage Regulator
Any changing of specification will not be informed individual
Page 4 of 6
SSC2129
Elektronische Bauelemente
http://www.SeCoSGmbH.com/
01-Jun-2002 Rev. A
CMOS Low Dropout
Voltage Regulator
Any changing of specification will not be informed individual
Page 5 of 6
SSC2129
Elektronische Bauelemente
CMOS Low Dropout
Voltage Regulator
Detailed Description
The SSC2129 of COMS regulators contain a PMOS pass transistor,voltage reference, error amplifier,over-current protection and thermal
shutdown.The P-channel pass transistor receives data from the error amplifier, over-current shutdown, and thermal protection circuits.
During normal operation, the error amplifier compares the output voltage to a precision reference. Over-current and Thermal shutdown circuits
o
become active when the junction temperature exceeds140 C, or the current exceeds 2.2A. During thermal shutdown, the output voltage
remains low. Normal operation is restored when the junction temperature drops below 120oC.
External Capacitors
The SSC2129 is stable with an output capacitance to ground of 4.7uF or greater. Ceramic capacitors have the lowest ESR, and will offer
the best AC performance. Conversely, Aluminum Electrolytic capacitors exhibit the highest ESR, resulting in the poorest AC response.
Unfortunately, large value ceramic capacitors are comparatively expensive. One option is to parallel a 0.1uF ceramic capacitor with a
10uF Aluminum Electrolytic. The benefit is low ESR, high capacitance, and low overall cost. A second capacitor is recommended between
the input and ground to stabilize VIN. The input capacitor should be at least 0.1uF to have a beneficial effect. A third capacitor can be
connected between the BY-PASS pin and GND. This capacitor can be a low cost Polyester Film variety between the value of
0.001~0.01uF. A large capcacitor improves the AC ripple rejection, but also makes the output come up slowly. This "Soft" turn-on
is desirable in some applications to limit turn-on surges. All capacitors should be placed in closed proximity to the pins. A "Quiet"
ground termination is desirable. This can be achieved with a "Star" connection.
Enable
When pulled low, the PMOS pass transistor shuts off, and all internal circuits are powered down. In this state, the quiescent current is
less than 1uA. This pin behaves much like an electronic switch.
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01-Jun-2002 Rev. A
Any changing of specification will not be informed individual
Page 6 of 6