GM6156

GM6156 GAMMA | Alldatasheet

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Technical content

Features

High output voltage accuracy Extremely accurate output voltage Guaranteed 150mA output Low quiescent current Low dropout voltage Extremely tight load and line regulation Very low temperature coefficient Current and thermal limiting Reverse-battery protection "Zero" off-mode current Logic-controlled electronic enable TYPICAL APPLICA TION CIRCUITS GM6156 V0.1 www.gammamicro.com 1 Cellular telephones Laptop, notebook, and palmtop computers Battery-powered equipment PCMCIA V and V regulation/ switchingCC PP Consumer/ personal electronics SMPS post-regulator/ dc-to-dc modules High-efficiency linear power supplies Low-Noise Operation: C = 470pF, C 2.2µFBYP OUT Basic Operation: C = not used, C 1µFBYP OUT GM6156-3.3 3 4 5EN GND VOUT C = 2.2µFIN (tantalum) Enable Shutdown BYP VIN

MARKING INFORMATION & PIN CONFIGURATIONS (TOP VIEW) Package Shipping Ordering Number Output V oltage GM6156

ORDERING INFORMATION

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 GM6156-AST25R GM6156-2.5ST25R GM6156-2.7ST25R GM6156-2.8ST25R GM6156-3.0ST25R GM6156-3.3ST25R GM6156-3.6ST25R GM6156-4.0ST25R GM6156-5.0ST25R 2.5V 2.7V 2.8V 3.0V 3.3V 3.6V 4.0V 5.0V Voltage Code EN GND BYP VOUTVIN SOT-25 (SOT-23-5) XX = Marking Code V = Voltage Code Y = Year W = Weekly (JA = GM6156) Pin Number Pin Name PIN DESCRIPTION VIN GND EN BYP Function Supply Input Ground Enable/ Shutdown(Input): COMS compatible input. Logic high = enable, logic low or open = shutdown. Reference Bypass: Connect external 470pF capacitor to GND to reduce output noise. May be left open.

4 VOUT Regulator Output

G T H J K L M Q XXVYW XXVYW SOT-25 (SOT-23-5) Adjustable Voltage Part Identification Fixed Voltages VOUTVIN EN GND ADJ * For detail Ordering Number identification, please see last page.

Parameter Symbol Min Typ Max UnitTest Condition Output Voltage Accuracy Output Voltage Temperature Coefficient VO Variation from specified VOUT (Note 4) 2 % ppm/ °CDV/ DTO 40 Line Regulation Load Regulation Dropout Voltage (Note 6) DV/ O VO DV/ O VO V- IN VO V = V + 1V to 16VIN OUT I = 0.1mA to 150mA, (Note 5)L I = 100µAL I = 50mAL I = 100mAL I = 150mAL 0.004 0.02 110 140 165 0.012 0.05 0.2/ 0.5 150 230 250 300 275 350 %/ V mV Quiescent Current Ground Pin Current (Note 7) IGND IGND 125 150 600 800 1000 1500 1900 2500 µA µA V 0.4V (shutdown)EN V 0.18V (shutdown)EN 0.01 350 600 1300 Ripple Rejection Current Limit Thermal Regulation PSRR ILIMT f = 100Hz, I = 0.1mAL V = 0VOUT (Note 8) 320 0.05 dB mA %/ W 500 DV/ DPOD Output Noise eNO I = 50mA, C = 2.2µF,LL 470pF from BYP to GND 260 ENABLE Input Enable Input Logic-Low Voltage VIL IIL Regulator shutdown V0.4 0.18 Enable Input Logic-High Voltage Enable Input Current VIH IIH Regulator enabled V2.0 V 0.4V IL V 0.18V IL V 2.0VIH 0.01 5 20 25 µA Note 1. Exceeding the absolute maximum rating may damage the device. Note 2. The device is not guaranteed to function outside its operating rating. Note 3: The maximum allowable power dissipation at any T (ambient temperature) is P (max) = (T (max) -T ) . Exceeding the maximum AD J A JA allowable power dissipation will result in excessive die temperature, and the regulator will go into thermal shutdown. Note 4: Output voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range. Note 5: Regulation is measured at constant junction temperature using low duty cycle pulse testing. Parts are tested for load regulation in the load range from 0.1mA to 150mA. Changes in output voltage due to heating effects are covered by the thermal regulation specification. Note 6: Dropout Voltage is defined as the input to output differential at which the output voltage drops 2% below its nominal value measured at 1V differential. Note 7: Ground pin current is the regulator quiescent current plus pass transistor base current. The total current drawn from the supply is the sum of the load current plus the ground pin current. Note 8: Thermal regulation is defined as the change in output voltage at a time "t" after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a 150mA load pulse at V = 16V for t = 10ms.IN q

ELECTRICAL CHARACTERISTICS

(V = V + 1V; I = 100µA; C = 1.0µF; V 2.0; T = 25°C, bold values indicate -40°C T +125°C;IN OUT L L EN J J unless otherwise noted) V 2.0V, I = 0.1mAEN L I = 50mAL I = 100mAL I = 150mAL %/V nV/ Hz µA

Forcing EN (enable/ shutdown) high (>2V) enables the regulator. EN is compatible with CMOS logic gates. If enable shutdown feature is not required, connect EN (pin 1) to IN (supply input, pin 5). See Figure 3. Input Capacitor A 1µF capacitor should be placed from IN to GND if there is more than 10 inches of wire between the input and the ac filter capacitor or if a battery is used as the input . Reference Bypass Capacitor BYP (reference bypass) is connected to the internal voltage reference. A 470pF capacitor (C ) connected BYP from BYP to GND quiets this reference, providing a significant reduction in output noise. C reduces the BYP regulator phase margin. When using C , output capacitors of 2.2µF or greater are generally required to BYP maintain stability. The start-up speed of GM6156 is inversely proportional to the size of the reference bypass capacitor. Applications requiring a slow ramp-up of output voltage should consider larger values of C . Likewise, if BYP rapid turn-on is necessary, consider omitting C . BYP If output noise is not a major concern, omit C and leave BYP open.BYP Output Capacitor An output capacitor is required between OUT and GND to prevent oscillation. The minimum size of the output capacitor is dependent upon whether a reference bypass capacitor is used. 1.0µF minimum is recommended when C is not used (see Figure 2). 2.2µF minimum is recommended when C is 470pF (see Figure 1). BYP BYP Larger values improve the regulator's transient response, the output capacitor value may be increased without limit. The output capacitor should have an ESR (effective series resistance) of about 5W or less and a resonant frequency above 1MHz. Ultra-low-ESR capacitors can cause a low amplitude oscillation on the output and/ or underdamped transient response. Most tantalum or aluminum electrolytic capacitors are adequate; film types will work, but are more expensive. Since many aluminum electrolytics have electrolytes that freeze at about -30°C, solid tantalums ate recommended for operation below -25°C. At lower values for output current, less output capacitance is required for output stability. The capacitor can be reduced to 0.47µF for current below 10mA or 0.33µF for current below 1mA. No-Load Stability GM6156 will remain stable and in regulation with no load (other than the internal voltage divider) unlike many other voltage regulators. This is especially important in CMOS RAM keep-alive applications. Thermal Considerations GM6156 is designed to provide 150mA of continuous current in a very small package. Maximum power dissipation can be calculated based on the output current and the voltage drop across the part. T o determine the maximum power dissipation of the package, use the junction-to-ambient thermal resistance of the device and the following basic equation: T is the maximum junction temperature of the die, 125°C, and TA is the ambient operating temperature. J(max) R is layout dependent; Table 1 shows examples of junction-to-ambient thermal resistance for the GM6156.JAq P =D(max) (T - T )J(max) A RqJA

maximum ground current for150mA output current is 2500µ or 2.5mA. SOT-25 package. For a full discussion of heat sinking and thermal effects on voltage regulators. Figure 3. Ultra-Low-Noise Fixed Voltage Application Figure 4. Low-Noise Fixed Voltage Application

5 V IN

Table 1. SOT-25 Thermal Resistance

less for best results. A capacitor from ADJ to ground provides greatly improved noise performance. Figure 5. Ultra-Low- Noise Adjustable Voltage Application Figure 5 includes the optional 470pF noise bypass capacitor from ADJ to GND to reduce output noise. must be diode clamped to ground. Figure 6. Power Supply Rejection Ratio Figure 7. Power Supply Rejection Ratio Figure 8. Dropout Voltage vs. Figure 9. Noise Performance

Gamma Micro. Circuit Type Output Voltage A: Adj, 2.5: 2.5V Package ST25: SOT-25 Shipping R: Tape & Reel SOT-25(SOT -23-5) P ACKAGE OUTLINE DIMENSIONS Pad Layout 2.9 ± 0.1 0.074 1.9 0.037 0.95 0.037 0.95 0.094 2.4 0.028 0.7 Inches mm ( ) 1.9 ± 0.05 0.95 ± 0.038 2.8 ± 0.1 1.5 ± 0.05 0.65 ± 0.05 0.35 ± 0.03 0.13 0~0.1 0.8 ± 0.05 1.10 ± 0.1 5° 5° Unit: mm 0.039 1.0