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SSC2156
600mA CMOS
Elektronische Bauelemente
RoHS Compliant Product
Positive Voltage Regulator
Description
The SSC2156 positive,linear regulators feature low ground current (30A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOP-8 package is attractive for "Pocket" and "Hand Held" applications.These rugged devices have both Thermal Shutdown and Current Fold-back to prevent device failure under the "Worst" of operating conditions. The SSC2156 is stable with an output capacitance of 2.2F or greater.
Features
* Low Temperature Coefficient * Over-Temperature Shutdown
REF. A B C D E F
* User Adjustable Output Voltages * Very Low Dropout Voltage * Accurate to within 1.5% * Guaranteed 600mA output * Current Limiting * Power-Saving Shutdown Mode * Short Circuit Current Fold-back
Min.
Millimeter
Max.
6.20 5.00 4.00 8 C 0.90 0.25
REF. M H L J K G
Min.
Millimeter
Max.
5.80 4.80 3.80 0C 0.40 0.19
0.10 0.25 0.35 0.49 1.35 1.75 0.375 REF. 45 C 1.27 TYP.
Applications
* PC Peripherals * Wireless Devices
* Portable Electronics * Battery Powered Widgets * Instrumentation * Cordless Phones
Functional Block Diagram
Typical Application Circuit
SSC2156
VOUT=1.215*(1+R1/R2) C2 is unnecessary if R1 or R2 < 20K[ R1 and R2 usd resistance vlaue within 1% accuracy for correct VOUT
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01-Jun-2002 Rev. A
Page 1 of 7
SSC2156
Elektronische Bauelemente
600mA CMOS Positive Voltage Regulator
Absolute Maximum Ratings
Parameter
Input Voltage Output Current Output Voltage Operating Ambient Temperature Junction Temperature Max. Junction Temperature Power Dissipation ( EDS Classification
Symbol
VIN IOUT VOUT Topr Tj Tj Max. PD
Ratings
8
PD/(VIN-VO) Gnd-0.3 to VIN+0.3 -40~+85 -40~+125 150 810
Unit
V mA
o o
V
C C
T=100 C)
o
o
C mW
o
B
Electrical Characteristics Ta=25 C unless otherwise noted
Parameter
Output Voltage Output Current Current Limit Load Regulation Dropout Voltage Ground Pin Current Line Regulation
Symbol
VOUT (E) IO ILIM
REGLOAD
1
Min.
-1.5% 600 600
_ _ _ _ _
Typ.
VOUT (T)
_
2
Max.
1.5%
_ _
Unit
V mA mA
Condition
IO=1mA,VIN=VOUT(T)+2V VO>1.2V VO>1.2V
800 0.2
_ _ _
1 1400 800 600
_
%
mV uA % V
o o
VIN=VOUT(T)+2V,IO=1mA~600mA 1.5VVDROPOUT IGND REGLINE VIN OTS OTH TC PSRR eN VEH VEL IEH IEL ISC ISD VREF
_ _
30
_
0.15 0.1 7
_
_ _ _ _ _ _
0.02
3
Input Voltage Over Temperature Shutdown Over Temperature Hystersis Output Voltage Temperature Coefficient Power Supply Rejection
Note
_ _ _ _ _ _
_
VIN=VOUT(T)+2V,IO=1mA~600mA Io=1mA VOUT(T)< 2.0V VIN=VOUT(T)+ 1 2.0V VOUT(T) to VOUT(T)+2
150 30 30 50 20 15 30
_ _ _ _
C C
ppm/ oC f=1kHz dB uVrms V uA f=10kHz IO=100mA Co=2.2uF
Output Voltage Noise EN Input Threshold EN Input Bias Current Short Circuit Current Shutdown Supply Current ADJ Reference Voltage
_
f=100kHz f=10Hz~100kHz, Io=10mA CO=2.2uF VIN=2.7V to 7V
2
_ _ _ _
VIN
0
0.4 0.1 0.5
_
VEN=VIN,VIN=2.7V~7V VEN=0V,VIN=2.7V~7V VIN=VOUT(T)+1V,VO<0.8V VIN=5V,VO=0,VEN30 300 1.215
600 1.227
mA V
1.203
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+VDROPOUT
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Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 2 of 7
SSC2156
600mA CMOS
Elektronische Bauelemente
Positive Voltage Regulator
Ordering Information(contd.)
Part Number
SSC2156-AD
Marking
6EAD2 XXXX
Output Voltage
Adjustable
Part Number
Marking
Output Voltage
Detailed Description
The SSC2156 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 exceeds150 C, or the current exceeds 600mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120o C. The SSC2156 switches from voltage mode when the load exceeds the rated output current.This prevents over-stress. The SSC2156 also incorporates current fold-back to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8V, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8V.
External Capacitors
The SSC2156 is stable with an output capacitance to ground of 2.2uF 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. 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
The Enable pin normally floats high. When actively, 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.
ADJ
The ADJ pin is the positive input to the error amplifier which, due to the PMOS pass element inversion, means it is actually the negative input of the LDO feedback loop. The feedback works to keep the voltage at the ADJ pin 1.215V with respect to ground. Since the internal circutry at the ADJ pin is essentially an ESD protected CMOS gate the input current at the ADJ pin is virtually zero.
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01-Jun-2002 Rev. A
Page 3 of 7
SSC2156
600mA CMOS
Elektronische Bauelemente
Positive Voltage Regulator
Characteristics Curve
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Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 4 of 7
SSC2156
600mA CMOS
Elektronische Bauelemente
Positive Voltage Regulator
http://www.SeCoSGmbH.com/
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
Page 5 of 7
SSC2156
600mA CMOS
Elektronische Bauelemente
External Resistor Divider Table
R1(K Ohm) VOUT 1.30 1.35 1.40 1.45 1.50 1.55 1.60 1.65 1.70 1.75 1.80 1.85 1.90 1.95 2.00 2.05 2.10 2.15 2.20 2.25 2.30 2.35 2.40 2.45 2.50 2.55 2.60 2.65 2.70 2.75 2.80 2.85 2.90 2.95 3.00 3.05 3.10 3.15 3.20 3.25 3.30
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Positive Voltage Regulator
1 14.29 9.00 6.57 5.17 4.26 3.63 3.16 2.79 2.51 2.27 2.08 1.91 1.77 1.65 1.55 1.46 1.37 1.30 1.23 1.71 1.12 1.07 1.03 0.98 0.95 0.91 0.88 0.85 0.82 0.79 0.77 0.74 0.72 0.70 0.68 0.66 0.64 0.63 0.61 0.60 0.58
2 28.59 18.00 13.14 10.34 8.53 7.25 6.31 5.59 5.01 4.54 4.15 3.83 3.55 3.31 3.10 2.91 2.75 2.60 2.47 2.35 2.24 2.14 2.05 1.97 1.89 1.82 1.75 1.69 1.64 1.58 1.53 1.49 1.44 1.40 1.36 1.32 1.29 1.26 1.22 1.19 1.17
3 42.88 27.00 19.70 15.51 12.79 10.88 9.47 8.38 7.52 6.81 6.23 5.74 5.32 4.96 4.64 4.37 4.12 3.90 3.70 3.52 3.36 3.21 3.08 2.95 2.84 2.73 2.63 2.54 2.45 2.37 2.30 2.23 2.16 2.10 2.04 1.99 1.93 1.88 1.84 1.79 1.75
4 57.18 36.00 26.27 20.68 17.05 14.51 12.62 11.17 10.02 9.08 8.31 7.65 7.09 6.61 6.19 5.82 5.49 5.20 4.93 4.70 4.48 4.28 4.10 3.94 3.78 3.64 3.51 3.39 3.27 3.17 3.07 2.97 2.88 2.80 2.72 2.65 2.58 2.51 2.45 2.39 2.33
5 71.47 45.00 32.84 25.85 21.32 18.13 15.78 13.97 12.53 11.36 10.38 9.57 8.87 8.27 7.74 7.28 6.86 6.50 6.17 5.87 5.60 5.35 5.13 4.92 4.73 4.55 4.39 4.23 4.09 3.96 3.83 3.72 3.61 3.50 3.40 3.31 3.22 3.14 3.06 2.99 2.91
6 85.76 54.00 39.41 31.02 25.58 21.76 18.94 16.76 15.03 13.63 12.46 11.48 10.64 9.92 9.29 8.73 8.24 7.80 7.40 7.04 6.72 6.42 6.15 5.90 5.67 5.46 5.26 5.08 4.91 4.75 4.60 4.46 4.33 4.20 4.08 3.97 3.87 3.77 3.67 3.58 3.50
7 100.06 63.00 45.97 36.19 29.84 25.39 22.09 19.55 17.54 15.90 14.54 13.39 12.42 11.57 10.83 10.19 9.61 9.10 8.63 8.22 7.84 7.49 7.18 6.89 6.62 6.37 6.14 5.93 5.73 5.54 5.37 5.20 5.05 4.90 4.76 4.63 4.51 4.40 4.28 4.18 4.08
8 114.35 72.00 52.54 41.36 34.11 29.01 25.25 22.34 20.04 18.17 16.62 15.31 14.19 13.22 12.38 11.64 10.98 10.40 9.87 9.39 8.96 8.56 8.20 7.87 7.56 7.28 7.02 6.77 6.55 6.33 6.13 5.94 5.77 5.60 5.45 5.30 5.16 5.02 4.90 4.78 4.66
9 128.65 81.00 59.11 46.53 38.37 32.64 28.40 25.14 22.55 20.44 18.69 17.22 15.96 14.88 13.93 13.10 12.36 11.70 11.10 10.57 10.08 9.63 9.23 8.85 8.51 8.19 7.90 7.62 7.36 7.12 6.90 6.69 6.49 6.30 6.13 5.96 5.80 5.65 5.51 5.37 5.24
10 142.94 90.00 65.68 51.70 42.63 36.27 31.56 27.93 25.05 22.71 20.77 19.13 17.74 16.53 15.48 14.55 13.73 12.99 12.34 11.74 11.20 10.70 10.25 9.84 9.46 9.10 8.77 8.47 8.18 7.92 7.67 7.43 7.21 7.00 6.81 6.62 6.45 6.28 6.12 5.97 5.83
Page 6 of 7
R2(K Ohm)=(1.215*R1(K Ohm))/(VOUT-1.215)
Any changing of specification will not be informed individual
01-Jun-2002 Rev. A
SSC2156
600mA CMOS
Elektronische Bauelemente
Positive Voltage Regulator
External Resistor Divider Table
R1(K Ohm) VOUT 3.35 3.40 3.45 3.50 3.55 3.60 3.65 3.70 3.75 3.80 3.85 3.90 3.95 4.00 4.05 4.10 4.15 4.20 4.25 4.30 4.35 4.40 4.45 4.50 4.55 4.60 4.65 4.70 4.75 4.80 4.85 4.90 4.95 5.00 0.57 0.56 0.54 0.53 0.52 0.51 0.50 0.49 0.48 0.47 0.46 0.45 0.44 0.44 0.43 0.42 0.41 0.41 0.40 0.39 0.39 0.38 0.38 0.37 0.36 0.36 0.35 0.35 0.34 0.34 0.33 0.33 0.33 0.32 1.14 1.11 1.09 1.06 1.04 1.02 1.00 0.98 0.96 0.94 0.92 0.91 0.89 0.87 0.86 0.84 0.83 0.81 0.80 0.79 0.78 0.76 0.75 0.74 0.73 0.72 0.71 0.70 0.69 0.68 0.67 0.66 0.65 0.64 1 2 3 1.71 1.67 1.63 1.60 1.56 1.53 1.50 1.47 1.44 1.41 1.38 1.36 1.33 1.31 1.29 1.26 1.24 1.22 1.20 1.18 1.16 1.14 1.13 1.11 1.09 1.08 1.06 1.05 1.03 1.02 1.00 0.99 0.98 0.96 4 2.28 2.22 2.17 2.13 2.08 2.04 2.00 1.96 1.92 1.88 1.84 1.81 1.78 1.75 1.71 1.68 1.66 1.63 1.60 1.58 1.55 1.53 1.50 1.48 1.46 1.44 1.41 1.39 1.37 1.36 1.34 1.32 1.30 1.28 5 2.85 2.78 2.72 2.66 2.60 2.55 2.49 2.44 2.40 2.35 2.31 2.26 2.22 2.18 2.14 2.11 2.07 2.04 2.00 1.97 1.94 1.91 1.88 1.85 1.82 1.79 1.77 1.74 1.72 1.69 1.67 1.65 1.63 1.61 6 3.41 3.34 3.26 3.19 3.12 3.06 2.99 2.93 2.88 2.82 2.77 2.72 2.67 2.62 2.57 2.53 2.48 2.44 2.40 2.36 2.33 2.29 2.25 2.22 2.19 2.15 2.12 2.09 2.06 2.03 2.01 1.98 1.95 1.93 7 3.98 3.89 3.81 3.72 3.64 3.57 3.49 3.42 3.36 3.29 3.23 3.17 3.11 3.05 3.00 2.95 2.90 2.85 2.80 2.76 2.71 2.67 2.63 2.59 2.55 2.51 2.48 2.44 2.41 2.37 2.34 2.31 2.28 2.25 8 4.55 4.45 4.35 4.25 4.16 4.08 3.99 3.91 3.83 3.76 3.69 3.62 3.55 3.49 3.43 3.37 3.31 3.26 3.20 3.15 3.10 3.05 3.00 2.96 2.91 2.87 2.83 2.79 2.75 2.71 2.67 2.64 2.60 2.57 9 5.12 5.00 4.89 4.79 4.68 4.58 4.49 4.40 4.31 4.23 4.15 4.07 4.00 3.93 3.86 3.79 3.73 3.66 3.60 3.54 3.49 3.43 3.38 3.33 3.28 3.23 3.18 3.14 3.09 3.05 3.01 2.97 2.93 2.89 10 5.69 5.56 5.44 5.32 5.20 5.09 4.99 4.89 4.79 4.70 4.61 4.53 4.44 4.36 4.29 4.21 4.14 4.07 4.00 3.94 3.88 3.81 3.76 3.70 3.64 3.59 3.54 3.49 3.44 3.39 3.34 3.30 3.25 3.21 R2(K Ohm)=(1.215*R1(K Ohm))/(VOUT-1.215)
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01-Jun-2002 Rev. A
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