AP1551SL-13
AP1551SL-13 Datasheet
AP1551
| Part | Datasheet |
|---|---|
AP1551SL-13 |
AP1551SL-13 (pdf) |
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| Not Recommended for New Design 150KHz, Dual Channel 2A PWM Buck DC/DC Converter AP1551 - Features - Dual adjustable output channel - Adjustable output voltage range, 1.23V to 18V+4% - 150KHz +15% fixed switching frequency - Voltage mode non-synchronous PWM control - Thermal-shutdown and current-limit protection - ON/OFF shutdown control input - Operating voltage can be up to 22V - Output load current 2A - SOP-16L Pb-Free packages - Low power standby mode - Built-in switching transistor on chip - Applications - Simple High-efficiency step-down regulator - On-card switching regulators - Positive to negative converter - General Description The AP1551 is monolithic IC designed for dual channel step-down DC/DC converters, and own the ability of driving a 2A load each channel without additional transistor component. Due to reducing the number of external component, the board space can be saved easily. The external shutdown function can be controlled by 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. If current limit function occurred and VFB is down to 0.5V below, the switching frequency will be reduced. The AP1551 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 packages are available in a standard 16-lead SOP-16 package. - Pin Assignments - Pin Descriptions Top View GND2 1 GND2 2 SD2 3 VIN2 4 SD1 5 VIN1 6 GND1 7 GND1 8 16 GND2 15 GND2 14 FB2 13 VOUT2 12 FB1 11 VOUT1 10 GND1 9 GND1 SOP-16L Name VIN1/2 VOUT1/2 GND1/2 FB1/2 SD1/2 Description Operating voltage input Switching output Ground Output voltage feedback control ON/OFF Shutdown This datasheet contains new product information. Anachip Corp. reserves the rights to modify the product specification without notice. No liability is assumed as a result of the use of this product. No rights under any patent accompany the sale of the product. Not Recommended for New Design 150KHz, Dual Channel 2A PWM Buck DC/DC Converter - Ordering Information AP 1551 X Package S SOP-16L Packing Blank Tube A Taping AP1551 - Block Diagram Channel 1 and channel 2 are the same SD1 Current Source bias 1.235V Reference 2.5V Regulator Start up 200mV 220mV + Com_p + Amp _ Frequecy compen- sation Comp + Comp + Pre-driver 150kHz OSC. Thermal Shutdown VIN1 2A Switch VOUT1 GND Anachip Corp. Not Recommended for New Design 150KHz, Dual Channel 2A PWM Buck DC/DC Converter AP1551 - Absolute Maximum Ratings VCC VSD VFB VOUT PD TST TOP VOP Parameter Supply Voltage ON/OFF Pin input voltage Feedback Pin voltage Output voltage to Ground Power dissipation Storage temperature Operating temperature Operating voltage Rating +24 to +18 to +18 -1 Internally limited -65 to +150 -40 to +125 to +22 - Electrical Characteristics Unless otherwise specified, VIN=12V, ILOAD = 0.5A |
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