80mA DROPOUT LINEAR REGULATORS Power Management GM6081 80mA

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80mA DROPOUT LINEAR REGULATORS Power Management GM6081 80mA

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GM6081
80mA DROPOUT LINEAR REGULATORS
Power Management
GM6081 80mA linear voltage regulator with very dropout voltage (from typically 20mV light loads 300mV 80mA) very ground current (225µA 20mA output). includes logic-compatible enable input provides better than initial accuracy. GM6081 designed optimal performance with lowvalue, low-cost ceramic capacitors. most applications only 0.47µF output capacitance required stability. GM6081 designed specifically battery-powered devices. Itcan controlled CMOS compatible logic signal. When disabled, power consumption drops practically zero. on-off control required, enable tied input 3-terminal operation. further enhance battery life, ground current GM6081 increases only slightly dropout. Notable features GM6081 include current limiting, overtemperature shutdown, protection against reversed battery connection. GM6081 available 2.8V, 3.0V, 3.3V, 3.6V, 3.8V, 4.0V, 4.5V, 4.75V, 5.0V fixed voltages. Other voltages available special order.
Features
Wide Selection output voltages Guaranteed 80mA output Quiescent Current Dropout Voltage Tight Load Line Regulation Temperature Coefficient Current Thermal Limiting Reversed Input Polarity Protection Zero OFF- Mode Current Logic-Controlled Shutdown SOT-25 package
Application
Cellular Phones Notebook Computers Palmtops PDA's Battery-Powered Equipment Code Scanners High- Efficiency Linear Power Supplies SMPS Post-Regulator/DC-to-DC modules
TYPICAL APPLICATION CIRCUITS
Revision Mar. 2004
Enable Shutdown
GM6081
www.gammamicro.com
PRELIMINARY
GM6081
VOUT
0.47µF
GM6081
MARKING INFORMATION CONFIGURATIONS (TOP VIEW)
SOT-25 (SOT-23-5)
XXVVW
Specific Device Code(BA GM6081) Voltage Code Work Week
ORDERING INFORMATION
Ordering Number
GM6081-1.5ST25R GM6081-1.8ST25R GM6081-2.5ST25R GM6081-2.8ST25R GM6081-3.0ST25R GM6081-3.3ST25R GM6081-4.0ST25R GM6081-5.0ST25R
Output Voltage
Package
SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25 SOT-25
Shipping
3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel
detail Ordering Number identification, please last page.
GM6081
GM6081
DESCRIPTION
Number
Name
Function
Supply Input Ground Enable (Input): TTL/ COMS compatible control input. Logic high enabled, logic open shutdown. internally connented Regulator Output
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Power Dissipation Input Supply Voltage Enable Input Voltage Lead Temperature (Soldering, sec.) Storage Temperature Range
SYMBOL
TLEAD TSTG
RATINGS
Internally Limited +150 Note
UNITS
OPERATING RATINGS
PARAMETER
Input Voltage Enable Input Voltage Junction Temperature Range Thermal Resistance
SYMBOL
RATINGS
+2.5 Note
UNIT
GM6081
GM6081 ELECTRICAL CHARACTERISTICS
(VIN VOUT 1mA; 0.47µF; unless otherwise noted) 2.0; 25°C, bold values indicate -40°C +125°C;
Parameter
Output Voltage Accuracy Output Voltage Temp. Coefficient Line Regulation Load Regulation
Symbol
DVO/ DVO/ DVO/
Test Condition
Unit
ppm/
Note VOUT 0.1mA 80mA, Note 100µA
0.08 0.08 0.01 1800 0.05
Dropout Voltage, Note
20mA 50mA 80mA
Quiescent Current
0.4V (shutdown)
100µA, 2.0V (active) Ground Current, Note IGND =20mA, 2.0V (active) =50mA, 2.0V (active) =80mA, 2.0V (active) Ground Current Dropout Current Limit Ground Current Dropout Enable Input Enable Input Voltage Level Logic (OFF) Logic High (ON) 0.6V 2.0V IGNDDO ILIMIT DVO/ VOUT (nominal) -0.5V, Note VOUT Note
3000
Enable Input Current
0.01
Note Exceeding absolute maximum rating damage device. Note device guaranteed function outside operating rating. Note maximum allowable power dissipation function maximum junction temperature, TJ(max), junction -to-ambient thermal resistance, RqJA, ambient temperature, maximum allowable power dissipation RqJA. Exceeding maximum allowable power dissipation will result excessive temperature, regulator will into thermal shutdown. RqJA SOT-25 250°C/W, SOT-143 mounted (printed circuit) board. Note Output voltage temperature coefficient defined worst case voltage change divided total temperature range. Note Regulation measured constant junction temperature using duty cycle pulse testing. Changes output voltage heating effects covered thermal regulation specification. Note Dropout voltage defined input output differential which output voltage drops below nominal value measured differential. Note Ground current regulator quiescent current plus pass transistor base current. total current drawn from supply ofthe load current plus ground current. Note Thermal regulation defined change output voltage time after change power dissipation applied, excluding load lineregulation effects. Specifications 80mA load pulse 10ms. ambient temperature calculated using: PD(max) (TJ(max) -TA)
GM6081
GM6081
Applications Information
Input Capacitor Place 0.1µF capacitor from applications where there more than inches wire between input filter capacitor, where battery used input. Output Capacitor with based regulators, GM6081 requires output capacitor prevent oscillation. However, GM6081 extremely stable, requires only 0.47µF output capacitance stability. type capacitor, GM6081 works great with cheap, tiny ceramic capacitors-why spend more? increase output capacitor value without limit improve transient response. Caveat: best results capacitor with resonant frequency above 500kHz. Note that ceramic capacitor work great with GM6081, some ceramic capacitors have dielectrics with less-than-ideal thermal coefficients; this will affect capacitance value over temperature. Tantalum capacitors very stable over temperature, larger cost more. Aluminum electrolytics work their electrolytes freeze -30°C. Stick with Tantalums ceramics operation below -25°C. No-Load Stability Unlike many regulators, GM6081 will remain stable regulation with load other than internal voltage divider. This makes GM6081 ideal CMOS keep-alive applications. Enable Input GM6081 off-mode current practically zero. When enable input (EN) held below 0.6V, internal circuitry powered off. Pulling high (over 2.0V) turns GM6081. When held low, regulator draws only 10nA (typical). Although logic threshold TTL/CMOS compatible, pulled high 20V, independent VIN. Thermal Behavior GM6081 designed provide 80mA continuous current despite tiny SOT-323-5. calculate maximum power dissipation based output current voltage drop across part. determine maximum power dissipation package, junction-to-ambient thermal resistance device this simple equation:
PD(max)
(TJ(max)
RqJA
TJ(max) maximum junction temperature die, 125°C, maximum ambient temperature. RqJA junction-to-ambient thermal resistance ambient regulator. RqJA GM6081 450°C/W. actual power dissipation regulator circuit determined using basic equation:
(VIN VOUT) IOUT IGND
Substituting PD(max), determined above, solving operating conditions that critical your application will give maximum operating conditions regulator circuit. example, operating GM6081-3.0 room temperature, with minimum footprint layout, determine maximum input voltage output current.
PD(max)
PD(max) 450°
GM6081
GM6081
prevent device from going into thermal shutdown, exceed maximum power dissipation. Using output voltage 3.0V, output current 80mA, determine maximum input voltage. Ground current, maximum 80mA output current, found "Electrical Characteristics" section this data sheet.
222mW (VIN 3.0V) 80mA 222mW (80mA VIN) 240mW 462mW 83mA 5.57V max.
Therefore, 3.0V application 80mA output current accept maximum input voltage 5.6V SOT-323-5 package. Fixed-Voltage Regulator GM6081 ideal general-purpose voltage regulator handheld device. Where miniaturization paramount, can't beat GM6081 solution, with microscopic SOT-323-5 package (half footprint SOT-25) combined with tiny ceramic capacitors.
GM6081
GM6081 Typical Characteristics
1000 10µF COUT
Dropout Voltage (mV)
Dropout Voltage (mV)
80mA
10µF COUT
Output Current (mA)
100µA
Temperature (°C)
0.01
Figure Dropout Voltage Output Current
Figure Dropout Voltage Temperature
10µF COUT
Output Voltage
80mA 10µF COUT
Output Current (mA)
Output Voltage (mV)
100µA
Supply Voltage
Figure Dropout Characteristics
Figure Output Voltage Output Current
10µF COUT
MIN. Supply Voltage
VOUT 3.3V
Temperature (°C)
Figure Minimum Supply Voltage Temperature
GM6081
GM6081
SOT-25(SOT-23-5) PACKAGE OUTLINE DIMENSIONS
0.05 0.95 0.038 0.13
0.35 0.03
0.15 0.05 0.65 0.05
Layout
0~0.1
0.028
0.094
0.05
0.037 0.095 0.074 0.037 0.095
Inches
1.10
Unit:
ORDERING NUMBER
6081 ST25
Gamma Micro. Circuit Type Shipping Tape Reel
GM6081
Output Voltage 1.5: 1.5V, 1.8: 1.8V 2.5: 2.5V, 3.0: 3.0V 3.3: 3.3V, 4.0: 4.0V 5.0: 5.0V
Package ST25: SOT-25

80mA DROPOUT LINEAR REGULATORS Power Management GM6081 80mA

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