DATASHEET Dual 3A/Single 6A Step-Down DC/DC Power Module
ISL8203M
The ISL8203M is an integrated step-down power module rated for dual 3A output current or 6A current sharing operation. Optimized for generating low output voltages down to 0.8V, the ISL8203M is ideal for any low power low-voltage applications. The supply voltage range is from 2.85V to 6V. The two channels are 180° out-of-phase for input RMS current and EMI reduction. Each channel is capable of 3A output current. They can be combined to form a single 6A output in current sharing mode. While in current sharing mode, the interleaving of the two channels reduces input and output voltage ripple. The ISL8203M offers an independent power-good (PG) signal for each channel. When shut down, the ISL8203M discharges the output capacitor. Other features include internal digital soft-start, enable for power sequence, overcurrent protection and over-temperature protection. The ISL8203M integrates a PWM controller, synchronous switching MOSFETs, inductors and passive components to maximize efficiency and minimize external component count. The ISL8203M is available in a thermally-enhanced, compact QFN package. Features Dual 3A and single 6A switching power supply High efficiency, up to 95% Input voltage range: 2.85V to 6V Output voltage range: 0.8V to 5V Internal digital soft-start: 1.5ms External synchronization up to 4MHz Compact size: 9.0mmx6.5mmx1.83mm Peak current limiting and hiccup mode short-circuit protection Overcurrent protection Applications µC/µP, FPGA and DSP power Plug-in DC/DC modules for routers and switchers Test and measurement systems Barcode reader Related Literature AN1941, "ISL8203MEVAL2Z Dual 3A/single 6A Evaluation Board Set-Up Procedure" INPUT 2.85V to 6V 2x22µF VIN1 VIN2 VDD EN1 EN2 SS SYNC ISL8203M VOUT1 1800pF FB1 OUTPUT1 1.5V/3A 100k 113k 3x22µF SGND OUTPUT2 1.8V/3A 1800pF 100k 80.6k 3x22µF VOUT2 FB2 m 9m 6.5 mm 1.83mm PGND SGND FIGURE 1. TYPICAL APPLICATION CIRCUIT - DUAL 3A FIGURE 2. SMALL FOOTPRINT PACKAGE WITH LOW PROFILE January 19, 2015 FN8661.3 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Copyright Intersil Americas LLC 2014, 2015. All Rights Reserved Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. All other trademarks mentioned are the property of their respective owners. ISL8203M
COMP RC NETWORK SHUTDOWN VIN1 1F SS SHUTDOWN SO FTSTART EN1 FB1 1.6k 3pF
SLO PE COMP + PGOO D COMPARATORS VIN1 PG1 1M
OSCILLATO R 1ms DELAY SGN D THERM …
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