ADP1883

Synchronous Current-Mode with Constant On-Time, PWM Buck Controller www.DataSheet4U.com ADP1882/ADP1883 FEATURES Power input voltage as low as 2.75 V to 20 V Bias supply voltage range: 2.75 V to 5.5 V Minimum output voltage: 0.8 V 0.8 V reference voltage with ±1.0% accuracy Supports all N-channel MOSFET power stages Available in 300 kHz, 600 kHz, and 1.0 MHz options No current-sense resistor required Power saving mode (PSM) for light loads (ADP1883 only) Resistor-programmable current-sense gain Thermal overload protection Short-circuit protection Precision enable input Integrated bootstrap diode for high-side drive 140 μA shutdown supply current Starts into a precharged load Small, 10-lead MSOP package TYPICAL APPLICATIONS CIRCUIT VIN = 2.75V TO 20V CC RTOP RC CC2 VIN ADP1882/ ADP1883 COMP/EN BST CBST FB DRVH SW CIN VOUT Q1 L VOUT RBOT GND CVDD2 VDD COUT Q2 RRES LOAD DRVL PGND Figure 1. 100 95 90 85 80 EFFICIENCY (%) APPLICATIONS Telecom and networking systems Mid to high end servers Set-top boxes DSP core power supplies VDD = 5.5V, VIN = 13.0V VDD = 5.5V, VIN = 16.5V VDD = 5.5V, VIN = 5.5V (PSM) VDD = 5.5V, VIN = 5.5V VDD = 3.6V, VIN = 5.5V 75 70 65 60 55 50 45 40 35 30 25 100 1k TA = 25°C VOUT = 1.8V fSW = 300kHz WURTH INDUCTOR: 744325120, L = 1.2µH, DCR = 1.8mΩ INFINEON MOSFETs: BSC042N03MS G (UPPER/LOWER) 10k 100k 08901-002 LOAD CURRENT (mA) Figure 2. ADP1882/ADP1883 Efficiency vs. Load Current (VOUT = 1.8 V, 300 kHz) GENERAL DESCRIPTION The ADP1882/AD...