ADP1877

The ADP1877 is designed as one kind of dual output synchronous Buck PWM controller device that can be used in (1)set top boxes; (2)printers; (3)communication infrastructure; (4)distributor power dc systems; (5)industrial and instrumentation applications. And this device includes externally adjustable soft start, output overvoltage protection, externally adjustable current limit, power good, and a programmable oscillator frequency.

Features of the ADP1877 are:(1)Input voltage range: 2.75 V to 14.5 V; (2)Output voltage range: 0.6 V to 90% VIN; (3)Maximum output current greater than 25 A per channel; (4)Programmable frequency: 200 kHz to 1.5 MHz; (5)Flex-Mode architecture with integrated drivers; (6)180° phase shift minimizes input ripple current and required input capacitance; (7)±0.85% output voltage accuracy .40°C to +85°C; (8)Integrated boost diodes; (9)Pulse skip high efficiency mode under light load; (10)Power good with internal pull-up resistor; (11)Overvoltage and overcurrent limit protection; (12)Thermal overload protection; (13)Input undervoltage lockout (UVLO); (14)Externally adjustable soft start, slope compensation and current sense gain; (15)Independent precision enable inputs; (16)Synchronization input; (17)Suitable for any output capacitors; (18)Available in 32-lead 5 mm × 5 mm LFCSP.

The absolute maximum ratings of the ADP1877 can be summarized as:(1)VIN, EN1/EN2, RAMP1/RAMP2: 15 V;(2)FB1/FB2, COMP1/COMP2, SS1/SS2, TRK1/TRK2, FREQ, SYNC, VCCO, VDL, PGOOD1/PGOOD2: -0.3 V to +6 V;(3)Maximum Soldering Lead Temperature: 260°C;(4)Storage Temperature Range: -65°C to +150°C;(5)Operating Junction Temperature Range: -40°C to +125°C;(6)Operating Ambient Temperature Range: -40°C to +85°C;(7)PGND1/PGND2 to AGND 20 ns Transients: -8 V to +4 V;(8)PGND1/PGND2 to AGND: -0.3 V to +0.3 V. If you want to know more information about the ADP1877, please download the datasheet in www.seekic.com or www.chinaicmart.com .