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GT1504-3.3V Dataheets PDF



Part Number GT1504-3.3V
Manufacturers GMOS Technology
Logo GMOS Technology
Description 2A PWM Buck Switching Regulator
Datasheet GT1504-3.3V DatasheetGT1504-3.3V Datasheet (PDF)

GT1504 150Khz, 2A PWM Buck Switching Regulator ■ General Description The GT1504 is a monolithic integrated circuit that provide all the active functions for a step-down switching regulator, capable of driving a 2A load without additional transistor component. Requiring a minimum number of external component, the board space can be saved easily. The external shutdown function can be controlled by TTL logic level and then come into standby mode. The internal compensation makes feedback control hav.

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GT1504 150Khz, 2A PWM Buck Switching Regulator ■ General Description The GT1504 is a monolithic integrated circuit that provide all the active functions for a step-down switching regulator, capable of driving a 2A load without additional transistor component. Requiring a minimum number of external component, the board space can be saved easily. The external shutdown function can be controlled by TTL logic level and then come into standby mode. The internal compensation makes feedback control have good line and load regulation without external design. Regarding protected function, thermal shutdown is to prevent over temperature operating from damage, and current limit is against over current operating of the output switch. The GT1504 operates at a switching frequency of 150Khz thus allowing smaller sized filter components than what would be needed with lower frequency switching regulators. Other features include a guaranteed +4% tolerance on output voltage under specified input voltage and output load conditions, and +15% on the oscillator frequency. The output version included fixed 3.3V, 5V, 12V, and an adjustable type. The packages are available in a standard 8-lead SOP8. GT1504 150Khz, 2A PWM Buck Switching Regulator ■ Ordering Information ■ GT1504 XX X X Output version -ADJ : Adjustable -33 : 3.3V -50 : 5.0V -12 : 12V Package BLANK: SOP-8L Packing Blank : Tube A : Taping ■ Features - 3.3V, 5V, 12V and adjustable output versions - Adjustable version output voltage range, 1.23V to 37V +4% max over line and load condiction - SOP-8L packages - Voltage mode non-synchronous PWM control - Thermal-shutdown and current-limit protection - ON/OFF shutdown control input - Input voltage range up to 40V - Output load current: 2A - 150 kHz fixed frequency internal oscillator - Low power standby mode - Built-in switching transistor on chip ■ Applications Simple High-efficiency step-down(buck) regulator Efficient preregulator for linear regulators On-card switching regulators Positive to negative converter Battery Charger ■ Block Diagram SD VIN 200mV Current Source bias 220 mV 1.235V Reference 2.5V Regulator Start up ■ Pin Assignments + Comp _ ■ Pin Descriptions (Top View) VIN 1 Out 2 FB 3 SD 4 SOP-8L 8 GND 7 GND 6 GND 5 GND Name VIN Out Gnd FB SD Comp + Description Operating voltage input. Switching output. Ground. Output voltage feedback control. ON/OFF Shutdown. FB + _ Amp Comp + Pre-driver 2A Switch Output 150kHz OSC. Thermal Limit Gnd GMOS Technology Crop. www.gmos-semi.com 1/9 GMOS Technology Corp. www.gmos-semi.com 2/9 GT1504 150Khz, 2A PWM Buck Switching Regulator ■ Absolute Maximum Ratings Symbol VCC VSD V FB VOUT PD TOP VOP GT1504 150Khz, 2A PWM Buck Switching Regulator Parameter Supply Voltage ON/OFF Pin input voltage Feedback Pin voltage Output voltage to Ground Power dissipation Storage temperature Operating temperature Operating voltage Rating +45 -0.3 to +25 -0.3 to +25 -1 Internally limited -65 to +150 -40 to +125 +4.5 to +25 Unit V V V V W o o ■ Electrical Characteristics (Continued) Symbol VFB GT1504-ADJ Parameter Output Feedback Efficiency Output voltage Efficiency Output voltage Efficiency Output voltage Efficiency Conditions 5V < VIN < 40V 0.2A < ILOAD < 2A V OUT programmed for 3V V IN = 12V, ILOAD=2A 5.5V < VIN < 40V 0.2A < ILOAD < 2A V IN = 12V, ILOAD=2A 8V < VIN < 40V 0.2A < ILOAD < 2A V IN = 12V, ILOAD=2A 15V < VIN < 40V 0.2A < ILOAD < 2A VIN = 15V, ILOAD = 2A Typ. Limit Unit V VMIN V MAX % 1.235 1.193/1.18 1.267/1.28 TST C C η VOUT GT1504-3.3V 75 3.3 75 5 80 12 90 11.52/11.4 12.48/12.6 4.8/4.75 5.2/5.25 3.168/3.135 3.432/3.465 V V VMIN V MAX % V VMIN V MAX % V VMIN V MAX % ■ Electrical Characteristics (All Output Voltage Versions) Unless otherwise specified, V IN =12V η Max. -50 -100 173 173 Unit GT1504-5V nA Khz GT1504-12V Khz V % 3.3 A uA mA 10 150 200 0.6 mA uA VOUT for 3.3V, 5V, adjustable version and V IN=24V for the 12V version. I LOA D = 0.2A Symbol IB Parameter Feedback bias current oscillator frequency Conditions V FB=1.3V (Adjustable version only) Min. Typ. -10 η VOUT FOSC 127 110 150 Oscillator frequency short circuit protect Fscp VSAT DC of When current limit occurred and V FB <0.55V IOUT =1.5A saturation voltage no outside circuit V FB=0V force driver on Max. Duty Cycle(ON) V FB=0V force driver on Min. Duty cycle(OFF) V FB=12V force driver off peak current current limit 2.4 no outside circuit V FB=0 force driver on no outside circuit Output = 0V Output Leakage V FB=12 force driver off Output = -1V Current V IN =24V Quiescent Current Standby Quiescent Current ON/OFF pin logic input threshold voltage 30 1.25 100 0 2.8 70 1.4 1.5 η Specifications with boldface type are for full operating temperature range, the other type are for T =25_C. J ICL 3.6 -200 IL IQ ISTBY VIL VIH IH IL Ts -5 5 70 V FB=12 force driver off ON/OFF pin=5V V IN =24V Low (regulator ON) High (regulator.


GT1504-ADJ GT1504-3.3V GT1504-5V


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