ALPHA Excellence Analog Power Products SP8156 Ultra-Low

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ALPHA Excellence Analog Power Products SP8156 Ultra-Low

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ALPHA
Excellence Analog Power Products
SP8156
Ultra-Low Dropout Voltage Regulator
FEATURES
4.5mA Typical Operating Current <1µA Typical Standby Current External Parts Count Optional Current Limit (35mV Typical Threshold) Initial Output Voltage Tolerance Most Configurations Output Voltage Tolerance Over Temperature Programmable (1.3 36V) With Resistors (SP8156) Enable Activate Shutdown Regulator Internal Gate-To Source Protective Clamp Versions Available SOIC
APPLICATIONS
Ultra-High Current Ultra-Low Dropout Voltage Regulators Constant High-Current Source Parts Count 5.0V 3.3V Computer Supply Noise/ Low-Dropout SMPS Post Regulator High-Current, Current-Limited Switch Monitors/VCR/TV
PRODUCT DESCRIPTION
ALPHA Semiconductor SP8156 contains single solution high-current low-dropout linear voltage regulation. Using advantageous transistor N-Channel power MOSFET linear pass element. SP8156 features dropout voltage that enhanced external power MOSFET. lowest possible dropout voltage becomes MOSFET (ON) multiplied source drain current same MOSFET. output current only limited safe power handling capacity MOSFET. SP8156 operates from 36V. external gate that same MOSFET gate drive supply required SP8156 provide higher voltage needed drive gate external MOSFET. When controller detects 35mV across optional external sense resistor regulator output constant current limited. SP8156 activates flag indicate a-low voltage more below nominal output. shutdown signal enable control reduces controller supply current less than forces output voltage ground. SP8156-3.3 SP8156-5.0 controllers have internally fixed output voltages. SP8156 [adjustable] output configured using external resistors. SP8156 available 8-Pin SOIC plastic Dip.
ORDERING INFORMATION
Part Number SP8156S-3.3 SP8156S-5.0 SP8156S SP8156P-3.3 SP8156P-5.0 SP8156P Temperature Range -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C -40°C +85°C
SO-8
CONNECTIONS
P-DIP SO-8 P-DIP
FIXED OUTPUT
FLAG (Source) (Drain) (Gate)
ADJUSTABLE OUTPUT
(Source) (Drain) (Gate)
ALPHA SP8156
FLAG
ALPHA SP8156
View
View
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 1/4/00
SP8156
ABSOLUTE MAXIMUM RATINGS
Supply Voltage .38V Enable (Input) -0.3 Voltage Gate. Voltage Source Flag. -0.3 Operating Junction Temperature.150°C Ambient Temperature Range. -40°C 85°C Storage Temperature -65°C 150°C Lead Temperature 300°C
+12V 0.1uF Enable Shutdown
FLAG
TYPICAL THERMAL RESISTANCES
Package SOIC 175° Typical Derating 5.7mW/°C
ALPHA SP8156
VOUT 3.3V,
47uF
47uF
DESCRIPTION
Enable (Input): high enables regulator; shuts down regulator. Flag Output flag (Output): Open collector output active (low) when VOUT more than below nominal output. Circuit Hysteresis. Circuit ground. N-Channel gate driving supply voltage. User supplied voltage driving gate external MOSFET. Supply Voltage (Input): Supply voltage connection. Connect sense resistor (RS) current limiting used. Connect supply bypass capacitor ground near device. Gate (Output): Drives gate external MOSFET. Drain current limit (Input): Connect External MOSFET drain external sense resistor (current limit) connect external MOSFET drain current limit). (Fixed) Source (Input): internal resistive divider chain. Connect directly load best load regulation. (Adj) Error Amplifier (Input): Connect external resistive divider.
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 1/4/00
SP8156
ELECTRICAL CHARACTERISTICS guaranteed over full junction temperature range (0°C 105°C). Ambient
temperature must derated based power dissipation package thermal characteristics. conditions are: VREF 10mA, unless otherwise specified. Parameter Conditions SP8156 Units Supply Voltage Supply Current Enable Input Threshold High Enable Input Bias Current 2.4V Minimum Gate Drive Voltage VSOURCE >VOUT (NOM) Current Limit Threshold VDD-VD ILIM Source Voltage Short (gate) source, Note SP8156-3.3 3.267 3.333 SP8156-5.0 4.950 5.050 Bandgap Reference Voltage SP8156(adjustable) 1.222 1.235 1.248 Output Voltage Line Regulation 5V<VDD< 15V,VOUT =3.3V Gate Source Clamp 16.6 Flag Comparator Threshold nominal VSOURCE Flag Comparator Hysteresis nominal VSOURCE Flag Comparator Sat. Voltage IFLAG 0.09
APPLICATION NOTES:
Functional Description Enable (EN): unused, must pulled high. maybe activated high from 2.6V 36V. This enables internal circuitry powered voltage less than 0.8V insures that SP8156 turned off. Gate Drive Supply Voltage difference between gate drive supply voltage supply voltage least 14V. minimum gate drive supply voltage VOUT where: gate drive supply voltage VOUT regulator output voltage gate source voltage full MOSFET gate enhancement. Output Regulation error amplifier feedback voltage internal feedback fixed versions below nominal start-up when compared with internal 1.235V bandgap reference. This forces turn-on external MOSFET. Once regulating output voltage with varying input voltage load conditions. adjusting error amplifier according feedback voltage.
Regulation Detection output voltage more below nominal, FLAG output will forced signal fault condition. FLAG output shutdown regulator used coordination with pin. Current Limiting Adding resistor between drain will implement current limiting. voltage drop across resistor reaches 35mV, error amplifier output reduces just enough constant limit output current. senses resistor voltage does exceed 35mV.
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 1/4/00
SP8156
TYPICAL CHARACTERISTICS
3.34 3.33
OUTPUT VOLTAGE
3.3V REGULATOR OUTPUT VOLTAGE TEMPERATURE
5.04 5.03
OUTPUT VOLTAGE
5.0V REGULATOR OUTPUT VOLTAGE TEMPERATURE
OUTPUT VOLTAGE
FLAG OUTPUT VOLTAGE TEMPERATURE
IFLAG =1mA
3.32 3.31 3.30 3.29 3.28 3.27 3.26
TEMPERATURE
5.02 5.01 5.00 4.99 4.98 4.97 4.96
TEMPERATURE
TEMPERATURE
STATE SUPPLY CURRENT TEMPERATURE
OFF-STATE SUPPLY CURRENT
FLAG OUTPUT VOLTAGE FLAG CURRENT
ENABLE THRESHOLD VOLTAGE
ENABLE THRESHOLD VOLTAGE TEMPERATURE
FLAG VOLTAGE
TEMPERATURE
FLAG SINK CURRENT (mA)
TEMPERATURE
ENABLE INPUT BIAS CURRENT ENABLE VOLTAGE
CURRENT LIMIT THRESHOLD (mV)
CURRENT LIMIT THRESHOLD TEMPERATURE
ENABLE BIAS CURRENT
ENABLE VOLTAGE
TEMPERATURE
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 1/4/00
SP8156
PACKAGE DRAWING SOIC-8
(0.158) (0.150)
(0.205) (0.181)
(0.244) (0.228)
1.27 (0.50)
1.75 (0.069) 1.35 (0.053) 0.78 (0.031) 0.61 (0.024) (0.197) (0.188) 0.37 (0.015) 0.77 (0.030) 0.64 (0.025) PLCS)
0.56 (0.022) 0.49 (0.019) 0.45 (0.018) 0.35 (0.014) 0.20 (0.008) 0.10 (0.004) 0.22 (0.009) 0.19 (0.007) PLCS)
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 1/4/00
SP8156
ADVANCE INFORMATION- These data sheets contain descriptions products that development. specifications based engineering calculations, computer simulation and/ initial prototype evaluation. PRELIMINARY INFORMATION- These data sheets contain minimum maximum specifications that based initial device characterizations. These limits subject change upon completion full characterization over specified temperature supply voltage ranges. information provided here believed reliable accurate, however ALPHA assumes responsibility use. ALPHA makes guarantee errors that appear this document. `Typical' parameters vary different applications. Customer's technical experts must validate operating parameters, including `Typical' each customer application. Specifications subject change without notice, contact ALPHA order obtain latest version device specification sheet before using ALPHA devices. ALPHA responsible defects that occur equipment using ALPHA devices. ALPHA makes representation that circuit descriptions herein will infringe upon existing patent rights.
ALPHA Semiconductor, Inc. 1031 Serpentine Lane Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 e-mail: alphasem@best.com web: www.alpha-semi.com
ALPHA Semiconductor-Taiwan 12F, 171, Road Taipei, Taiwan Tel: 886-2-27281190 Fax: 886-2-27591822 e-mail: alphasemi@ms14.hinet.net
LIFE SUPPORT APPLICATION POLICY: ALPHA Semiconductor products authorized critical components life support devices systems, nuclear power, aircraft, space equipment without express written approval from president ALPHA Semiconductor.
Alpha Semiconductor Inc. 1031 Serpentine Lane. Pleasanton, 94566 Tel: (925) 417-1391 Fax: (925) 417-1390 Rev. 1/4/00

ALPHA Excellence Analog Power Products SP8156 Ultra-Low

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