150mA NOISE REGULATOR Power Management GM6155 efficient line

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150mA NOISE REGULATOR Power Management GM6155 efficient line

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GM6155
150mA NOISE REGULATOR
Power Management
GM6155 efficient linear voltage regulator with ultralow noise output, very dropout voltage (typically 17mV light loads 100mV 50mA), very ground current (600µA 100mA output). GM6155 provides better than initial accuracy. Designed especially hand-held, battery-powered devices, GM6155 includes CMOS compatible enable/ shutdown control input. When shutdown, power consumption drops nearly zero. Regulator ground current increases only slightly dropout, further prolonging battery life. GM6155 features include reference bypass improve already excellent low-noise performance, reversed-battery protection, current limiting, overtemperature shutdown. GM6155 available SOT-25 package.
Features
Very noise output Extremely accurate output voltage Guaranteed 150mA output quiescent current dropout voltage Extremely tight load line regulation Very temperature coefficient Current thermal limiting Reverse-battery protection "Zero" off-mode current Logic-controlled electronic enable
Application
Cellular telephones Laptop, notebook, palmtop computers Battery-powered equipment PCMCIA regulation/ switching TYPICAL APPLICATION CIRCUITS
Revision Feb. 2004 Low-Noise Operation: CBYP 470pF, COUT Basic Operation: CBYP used, COUT 2.2µF www.gammamicro.com
Consumer/ personal electronics SMPS post-regulator/ dc-to-dc modules High-efficiency linear power supplies
Enable Shutdown
GM6155-3.3
VOUT
COUT 2.2µF (tantalum)
CBYP (pin connected directly (pin1).
PRELIMINARY
GM6155
GM6155
MARKING INFORMATION CONFIGURATIONS (TOP VIEW)
SOT-25 (SOT-23-5)
SOT-25 (SOT-23-5)
Part Identification
XXVYW
XXVYW
Fixed Voltages
Adjustable Voltage
Specific Device Code(DA GM6155) Voltage Code Year Work Week
ORDERING INFORMATION
Ordering Number
GM6155-AST25R GM6155-2.5ST25R GM6155-2.7ST25R GM6155-2.8ST25R GM6155-2.9ST25R GM6155-3.0ST25R GM6155-3.3ST25R GM6155-3.6ST25R GM6155-4.0ST25R GM6155-4.2ST25R GM6155-5.0ST25R
Output Voltage Voltage Code
2.5V 2.7V 2.8V 2.9V 3.0V 3.3V 3.6V 4.0V 4.2V 5.0V
Package
SOT-25 SOT-25 SOT-25 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 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel 3,000 Units/ Tape Reel
detail Ordering Number identification, please last page.
DESCRIPTION
Number
Name
Function
Supply Input Ground Enable/ Shutdown(Input): COMS compatible input. Logic high enable, logic open shutdown. Reference Bypass: Connect external 470pF capacitor reduce output noise. left open. Regulator Output
GM6155
GM6155
BLOCK DIAGRAM
Bandgap Ref.
VOUT COUT
CBYP (Optional)
Current Limit Thermal Shutdown
Bandgap Ref.
VOUT COUT
Figure Ultra-Low-Noise Fixed Regulator
Current Limit Thermal Shutdown
CBYP (Optional)
VOUT VREF
Figure Ultra-Low-Noise Adjustable Regulator
ABSOLUTE MAXIMUM RATINGS
PARAMETER
Supply Input Voltage Enable Input Voltage Power Dissipation (Note Junction Temperature Lead Temperature (soldering, seconds) Storage Temperature
SYMBOL
TLEAD
RATINGS
Internally Limited +125 +150
UNITS
OPERATING RATINGS
Supply Input Voltage Enable Input Voltage Junction Temperature Thermal Resistance
+2.5 (Note
GM6155
PARAMETER
SYMBOL
RATINGS
UNITS
GM6155 ELECTRICAL CHARACTERISTICS
(VIN VOUT 100µA; 1.0µF; unless otherwise noted) 2.0; 25°C, bold values indicate -40°C +125°C;
Parameter
Output Voltage Accuracy Output Voltage Temperature Coefficient Line Regulation Load Regulation
Symbol
DVO/ DVO/ DVO/
Test Condition
Variation from specified VOUT (Note VOUT 0.1mA 150mA, (Note 100µA 50mA
Unit
ppm/
0.004 0.02 0.01 1300 0.05 0.012/ 0.05 0.2/ 1000 1500 1900 2500
Dropout Voltage (Note
100mA 150mA
Quiescent Current
IGND
0.4V (shutdown)
0.18V (shutdown) 2.0V, 0.1mA 50mA
Ground Current (Note
IGND
100mA 150mA
Ripple Rejection Current Limit Thermal Regulation Output Noise ENABLE Input Enable Input Logic-Low Voltage Enable Input Logic-High Voltage
PSRR ILIMT DVO/
100Hz, 0.1mA VOUT (Note 50mA, 2.2µF, 470pF from
Regulator shutdown Regulator enabled 0.4V 0.18V 2.0V 0.01
0.18
Enable Input Current
GM6155
Note Exceeding absolute maximum rating damage device. Note device guaranteed function outside operating rating. Note maximum allowable power dissipation (ambient temperature) PD(max) (TJ(max) -TA) qJA. Exceeding maximum allowable power dissipation will result excessive temperature, regulator will into thermal shutdown. 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. Parts tested load regulation load range from 0.1mA 150mA. 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 load current plus ground current. Note Thermal regulation defined change output voltage time after change power dissipation applied, excluding load line regulation effects. Specifications 150mA load pulse 10ms.
GM6155
Applications Information Enable/ Shutdown
Forcing (enable/ shutdown) high (>2V) enables regulator. compatible with CMOS logic gates. enable shutdown feature required, connect (pin (supply input, Figure
Input Capacitor
capacitor should placed from there more than inches wire between input acfilter capacitor battery used input
Reference Bypass Capacitor
(reference bypass) connected internal voltage reference. 470pF capacitor (CBYP) connected from quiets this reference, providing significant reduction output noise. CBYP reduces regulator phase margin; when using CBYP, output capacitors 2.2µF greater generally required maintain stability. start-up speed GM6155 inversely proportional size reference bypass capacitor. Applications requiring slow ramp-up output voltage should consider larger values CBYP. Likewise, rapid turn-on necessary, consider omitting CBYP. output noise major concern, omit CBYP leave open.
Output Capacitor
output capacitor required between prevent oscillation. minimum size output capacitor dependent upon whether reference bypass capacitor used. 1.0µF minimum recommended when CBYP used (see Figure 2.2µF minimum recommended when CBYP 470pF (see Figure Larger values improve regulator's transient response. output capacitor value increased without limit. output capacitor should have (effective series resistance) about less resonant frequency above 1MHz. Ultra-low-ESR capacitors cause amplitude oscillation output and/ underdamped transient response. Most tantalum aluminum electrolytic capacitors adequate; film types will work, more expensive. Since many aluminum electrolytics have electrolytes that freeze about -30°C, solid tantalums recommended operation below -25°C. lower values output current, less output capacitance required output stability. capacitor reduced 0.47µF current below 10mA 0.33µF current below 1mA.
No-Load Stability
GM6155 will remain stable regulation with load (other than internal voltage divider) unlike many other voltage regulators. This especially important CMOS keep-alive applications.
Thermal Considerations
GM6155 designed provide 150mA continuous current very small package. Maximum power dissipation calculated based output current voltage drop across part. determine maximum power dissipation package, junction-to-ambient thermal resistance device following basic equation:
PD(max)
RqJA
TJ(max) maximum junction temperature die, 125°C, ambient operating temperature. RqJA layout dependent; Table shows examples junction-to-ambient thermal resistance GM6155.
GM6155
(TJ(max)
GM6155
Parameter
SOT-23-5
RqJA Recommended Minimum Footprint
220°C/
RqJA Square Copper Clad
170°C/
RqJC
130°C/
Table SOT-25 Thermal Resistance actual power dissipation regulator circuit determined using equation:
(VIN VOUT) IOUT IGND
Substituting PD(max) solving operating conditions that critical application will give maximum operating conditions regulator circuit. example, when operating GM6155 room temperature with minimum footprint layout, maximum input voltage output current determined follows: (125°C 25°C)
PD(max)
220°C/W
PD(max) 455mW
junction-to-ambient thermal resistance minimum footprint 220°C/ from Table maximum power dissipation must exceeded proper operation. Using output voltage 3.3V output current 150mA, maximum input voltage determined. From Electrical Characteristics table, maximum ground current for150mA output current 2500µA 2.5mA.
455mW (VIN 3.3V) 150mA 2.5mA 455mW 150mA 495mA 2.5mA 950mW 152.5mA VIN(max) 6.23V
Therefore, 3.3V application 150mA output current accept maximum input voltage 6.2V SOT-25 package. full discussion heat sinking thermal effects voltage regulators. Fixed Regulator Applications
Figure Ultra-Low-Noise Fixed Voltage Application VOUT 2.2µF 470pF Enable Shutdown Figure Low-Noise Fixed Voltage Application VOUT 1.0µF
GM6155
GM6155
Figure includes 470pF capacitor low-noise operation shows (pin connected (pin application where enable/ shutdown required. COUT 2.2µF minimum.
Figure example low-noise configuration where CBYP required. minimum.
Adjustable Regulator Applications
GM6155 adjusted specific output voltage using externa resistors (Figure resistors output voltage based following equation:
VOUT 1.242V
GM6155
GM6155
This equation correct configuration bandgap reference. bandgap voltage relative output, seen block diagram. Traditional regulators normally have reference voltage relative ground have different VOUT equation. Resistor values critical because ADJ(adjust) high input impedance, best results resistors 470kW less. capacitor from ground provides greatly improved noise performance.
VOUT 2.2µF
GM6155-Adj
470pF
Figure Ultra-Low- Noise Adjustable Voltage Application Figure includes optional 470pF noise bypass capacitor from reduce output noise. Dual-Supply Operation When used dual supply systems where regulator load returned negative supply, output voltage must diode clamped ground.
Typical Characteristics
VOUT
PSRR (dB)
VOUT
PSRR (dB)
IOUT =100mA COUT 2.2µF CBYP 0.01µF 100k
FREQUENCY(Hz)
-100
IOUT =100mA COUT 100k
FREQUENCY(Hz)
-100
Figure Power Supply Rejection Ratio
DROPOUT VOLTAGE (mV)
Figure Power Supply Rejection Ratio
125°C 25°C -40°C
NOISE (µV/
100mA 10mA 0.01
VOUT=5V 0.001 COUT=10µF electrolytic CBYP=10nF 0.0001
100k
OUTPUT CURRENT (mA)
FREQUENCY(Hz)
Figure Dropout Voltage Output Current
Figure Noise Performance
GM6155
GM6155
SOT-25(SOT-23-5) PACKAGE OUTLINE DIMENSIONS
0.05 0.95 0.038 0.13
Layout
0~0.1
0.028
0.35 0.03
0.65 0.05
0.15 0.05
0.094
0.05
0.037 0.095 0.074 0.037 0.095
Inches
1.10
Unit:mm
ORDERING NUMBER
6155 ST25
Gamma Micro. Circuit Type Shipping Tape Reel
GM6155
Output Voltage Adj, 2.5: 2.5V 2.7: 2.7V, 2.8: 2.8V 2.9: 2.9V, 3.0: 3.0V 3.3: 3.3V, 3.6: 3.6V 4.0: 4.0V, 4.2: 4.2V
Package ST25: SOT-25

150mA NOISE REGULATOR Power Management GM6155 efficient line

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