GT2133 ETL | Alldatasheet
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Technical content
ISSUED DATE :2006/01/26 REVISED DATE : GGTT 22 11 33 33 CC MM OO SS PP oo ss ii tt ii vv ee VV oo ll tt aa gg ee RR ee gg uu ll aa tt oo rr
Description
The GT2133 series of positive, linear regulators feature low quiescent current (30A typ.) with low dropout voltage, making them ideal for battery applications. The space-saving SOT-26 package is attractive for “Pocket” and “Hand Held” applications. This rugged device has both Thermal Shutdown, and Current Fold-back to prevent device failure under the “Worst” of operating conditions. An additional feature is a “Power Good” detector, which pulls low when the output is out of regulation. In applications requiring a low noise, regulated supply, place a 1000pF capacitor between Bypass and ground. The GT2133 is stable with an output capacitance of 2.2F or greater. Features Functional Block Diagram &Very Low Dropout Voltage &Guaranteed 300mA output &Over-Temperature Shutdown &Current Limiting &Short Circuit Current Fold-back &Typical Accurate± 1.5% &Noise Reduction Bypass Capacitor &Power-saving Shutdown Mode &Power Good Detector &Factory Pre-set Output Voltages &Low Temperature coefficient
Applications
&Battery Powered Widgets &Instrumentation &Wireless Devices &PC Peripherals &Portable Electronics &Cordless Phones &Electronic Scales Package Dimensions Millimeter Dimensions REF. Min. Max. REF. Millimeter A 2.70 3.10 G 1.90 REF. B 2.60 3.00 H 1.20 REF. C 1.40 1.80 I 0.12 REF. D 0.30 0.55 J 0.37 REF. E 0 0.10 K 0.60 REF. F 0° 10° L 0.95 REF. Typical Application Circuit
ISSUED DATE :2006/01/26 REVISED DATE : Absolute Maximum Ratings Parameter Symbol Ratings Unit Input Max Voltage VIN 8 V Output Current IOUT PD/( VIN- VO) mA Input, Output Voltage GND-0.3 to VIN+0.3 V Operating Ambient Temperature Topr -40 ~ +85 : Junction Temperature Tj -40 ~ +125 : Maximum Junction Temperature Tj Max 150 : Thermal Resistance ja 260 :/W Power Dissipation(æT=100:) PD 380 mW EDS Classification B Electrical Characteristics Ta=25:::: unless otherwise noted Parameter Symbol Condition Min TYP Max Unit Output Voltage VOUT(E) (Note1) VIN=VOUT(T)+2V, IO=1mA -1.5% VOUT(T) (Note2) 1.5% V Output Current IO VIN=VOUT(T)+2V, VO>1.2 300 - - mA Current Limit ILIM VIN=VOUT(T)+2V, VO>1.2 300 450 - mA Load Regulation REGLOAD VIN=VOUT(T)+2V, IO=1mA to 300mA -1 0.2 1 % 1.2V VOUT(T) 2.0V - - 1300 2.0V<VOUT(T) 2.8V - - 400 Dropout Voltage VDROPOUT IO=300mA VO=VOUT(E)-2% 2.8V<VOUT(T) - - 300 mV Quiescent Current IQ VIN= VOUT(T)+1V, IO=0mA - 30 50 A Ground Pin Current IGND VIN= VOUT(T)+2V, IO=1mA~300mA - 35 - A 1.2V VOUT(T) 1.4V -0.2 - 0.2 2.0V<VOUT(T)<4\`ˆØ -0.1 0.02 0.1 Line Regulation REGLINE IO=1mA VIN=VOUT(T)+1 to VOUT(T)+2 Input Voltage VIN Note3 - 7 V Over Temperature Shutdown OTS - 150 - : Over Temperature Hysterisis OTH - 30 - : Vo Temperature Coefficient TC - 30 - ppm/: Short Circuit Current(Note4) ISC VIN=VOUT(T)+1V, VO<0.8V - 150 300 mA f=1kHz - 50 - f=10kHz - 20 - Power Supply Rejection PSRR VIN=VOUT(T)+2V Io=100mA Co=2.2F f=100kHz - 15 - dB Output Voltage Noise eN f=10Hz~100kHz Io=10mA Co=2.2F - 30 - Vrms VEH VIN=2.7V to 7V 2.0 - VIN V EN Input Threshold VEL VIN=2.7V to 7V 0 - 0.4 V IEH VEN=VIN, VIN=2.7V to 7V - - 0.1 A EN Input Bias Current IEL VEN= 0V, VIN=2.7V to 7V - - 0.5 A Shutdown Supply Current ISD VIN=5V, VO=0V, VEN<VEL - 0.5 1 A Shutdown Output Voltage VO,SD Io=0.4mA, VEN<VEL 0 - 0.4 V 2.5V VOUT(T) 5.0V - - 85 Output Under Voltage VUV 1.2V VOUT(T)<2.5V - - 75 % VOUT(T) 2.5V VOUT(T) 5.0V 115 - - Output Over Voltage VOV 1.2V VOUT(T)<2.5V 125 - - % VOUT(T) PG Leakage Current ILC VPG=7V - - 1 A PG Voltage Rating VPG VO in regulation - - 7 V PG Voltage Low VOL ISINK=0.4mA - - 0.4 V 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 4: To prevent the Short Circuit Current protection feature from being prematurely activated, the input voltage must be applied before a current source load is applied.
ISSUED DATE :2006/01/26 REVISED DATE : Ordering Information ( contd. ) Part Number Marking Output Voltage Part Number Marking Output Voltage GT2133-15 3C152 XXXX 1.5V GT2133-18 3C182 XXXX 1.8V GT2133-25 3C252 XXXX 2.5V GT2133-27 3C272 XXXX 2.7V GT2133-28 3C282 XXXX 2.8V GT2133-29 3C292 XXXX 2.9V GT2133-30 3C302 XXXX 3.0V GT2133-31 3C312 XXXX 3.1V GT2133-33 3C332 XXXX 3.3V GT2133-34 3C342 XXXX 3.4V GT2133-35 3C352 XXXX 3.5V GT2133-36 3C362 XXXX 3.6V GT2133-37 3C372 XXXX 3.7V GT2133-38 3C382 XXXX 3.8V GT2133-2H 3C2H2 XXXX 2.85V Detailed Description The GT2133 family of COMS regulators contain a PMOS pass transistor, voltage reference, error amplifier, over-current protection, thermal shutdown and Power Good detection circuitry. 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 become active when the junction temperature exceeds 150:, or the current exceeds 300mA. During thermal shutdown, the output voltage remains low. Normal operation is restored when the junction temperature drops below 120:. The GT2133 switches from voltage mode to current mode when the load exceeds the rated output current. This prevents over-stress. The GT2133 also incorporates current fold-back to reduce power dissipation when the output is short circuited. This feature becomes active when the output drops below 0.8 volts, and reduces the current flow by 65%. Full current is restored when the voltage exceeds 0.8 volts. External Capacitors The GT2133 is stable with an output capacitance to ground of 2.2F 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 0.1F ceramic capacitor with a 10F 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 0.1F to have a beneficial effect. A third capacitor can be connected between the BY-Pass pin and Gnd. This capacitor can be a low cost Polyester Film variety between the value 0.001 ~ 0.01uF. A large capacitor improves the AC ripple rejection, but also makes the output come up slowly. This “Soft” turn-on is desirable in some applications to limit turn-on surges. All capacitors should be placed in close 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 1A. This pin behaves much like an electronic switch. Power Good The GT2133 includes the Power Good feature. When the output is not within ±15% of the specified voltage, it pulls low. This can occur under the following conditions: 1) Input Voltage too low. 2) During Over-Temperature. 3) During Over-Current. 4) If output is pulled up. (Note: PG pin is an open-drain output.)
ISSUED DATE :2006/01/26 REVISED DATE : Characteristics Curve
ISSUED DATE :2006/01/26 REVISED DATE :
ISSUED DATE :2006/01/26 REVISED DATE :
ISSUED DATE :2006/01/26 REVISED DATE : Important Notice: All rights are reserved. Reproduction in whole or in part is prohibited without the prior written approval of GTM. GTM reserves the right to make changes to its products without notice. GTM semiconductor products are not warranted to be suitable for use in life-support Applications, or systems. GTM assumes no liability for any consequence of customer product design, infringement of patents, or application assistance. Head Office And Factory: TEL : 886-3-597-7061 FAX : 886-3-597-9220, 597-0785 China: (201203) No.255, Jang-Jiang Tsai-Lueng RD. , Pu-Dung-Hsin District, Shang-Hai City, China TEL : 86-21-5895-7671 ~ 4 FAX : 86-21-38950165