Dual Output Synchronous Buck PWM Controller
The boost diodes are built into the ADP1877, thus lowering the overall system cost and component count. The ADP1877 can be set to operate in pulse skip high efficiency mode under light load or in PWM continuous conduction mode.
The ADP1877 includes externally adjustable soft start, output overvoltage protection, externally adjustable current limit, power good, and a programmable oscillator frequency that ranges from 200 kHz to 1.5 MHz. The ADP1877 provides an output voltage accuracy of ±0.85% from −40°C to +85°C and ±1.5% from −40°C to 125°C in junction temperature. This part can be powered from a 2.75 V to 14.5 V supply, operates over the −40oC to +125oC junction temperature range, and is availa-ble in a 32-lead 5 mm × 5 mm LFCSP package.
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Synchronous Inverse SEPIC Topology Provides High Efficiency Buck/Boost...
The article describes the inverse SEPIC (single-ended primary inductor converter) topology using the ADP1877, an...
Power Reference Designs
ADP1877 Vin 10.8-13.2V Vout 1.2, 1.8, 3.3, 5V
Four Output Voltages: 1.2 V, 1.8 V, 3.3 V, 5 V; Output Current: 1 A to 3.5 A; Ripple 50 mV ppk; Transient step...
Power Reference Designs
ADP1877 Reference Design
Input 10.8 V to 13.2 V. The output voltages: VOUT1 = 1.2 V 2 A, VOUT2 = 1.8 V 1.8 A, VOUT3 = 3.3 V 1 A, VOUT4 = 5.0 V...
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