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IT7321 Datasheet

Dual 5V/1A High Efficiency Step-Down DC/DC Converter

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IT7321 pdf
Dual 5V/1A High Efficiency Step-Down DC/DC Converter
The IT7321DF is a dual high efficiency
synchronous step-down DC-DC converter,
optimized for battery powered portable
applications. It can supply 1A of load current at
input voltage ranging from 2.5V to 6.0V and
enter the power saving mode operation at light
load current to maintain high efficiency over the
entire load current range. The IT7321DF
operates at a fixed switching frequency of
1.5MHz, allowing the use of small surface
mount inductors and capacitor. The devices are
ideal for portable applications powered by a
single Li-Ion battery cell or by 3-cell NiMH /
NiCd batteries. With an output voltage range
from 6.0V down to 0.6V, it also can support low
voltage DSPs and processors in PDAs, pocket
PCs, as well as notebooks and sub notebook
High Efficiency up to 95%
2.5V to 6.0V Input Voltage Range
1A Output Current on Each Channel
1.5MHz Constant Frequency Operation
Current Mode Operation
Internal Soft-start
Over-temperature Protection
100% Duty Cycle for Lowest Dropout
0.1ยตA Shutdown Current
DFN 12L 3x3 Small Package
RoHS Compliant (100% Green Available)
PDA, PMP, Pocket PC, and Smartphone
PDA and Smartphone
USB Powered Modems
Microprocessor and DSP Core Supply
Wireless and DSL Card
Portable Device
Typical Applications
Efficiency vs. Output Current at VIN=5V
Note: Fix Voltage Version: R2 & R4=NC, R1 & R3=0R
Figure 1. Typical Application Circuit
Efficiency vs. Output Current at VIN=3.3V
Rev. 0.2.1
M3tekic Confidential

Part Number IT7321
Description Dual 5V/1A High Efficiency Step-Down DC/DC Converter
Maker M3TEK
Total Page 1 Pages
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