The JTMH1223/JTMH1223A is a high efficiency synchronous,buck

1.产品概述 2.产品特点 3.应用范围 4.技术规格书下载（产品PDF文档）
5.产品封装图 6.电路原理图 7.功能概述 8.相关产品

一,产品概述(General Description)

The JTMH1223 is a high efficiency synchronous,buck DC/DC converter using a
constant frequency, current mode architecture. 100% duty cycle capability extends
battery life in portable devices, while the supply current is 200μA with no load, and
drops to <1μA in shutdown. The 2.5V to 5.5V input voltage range makes the
JTMH1223 ideally suited for battery-powered applications.single Li-IonSwitching
frequency is internally set at 0.95MHz,allowing the use of small surface mount inductors
and capacitors.The internal synchronous switch increases efficiency and eliminates
the need for an external Schottky diode. Low output voltages are easily supported
with the 0.8V feedback reference voltage. The JTMH1223 is available in a low profile
SOT-23-5L package.
二.产品特点(Features)

Up to 93% Efficiency
Low Quiescent Current: 200μA
Up to 1.4A Load Current
Input Voltage: 2.5V ～ 5.5V
No Schottky Diode Required
950kHz Fixed Frequency Switching
0.8V Reference Allows Low Output Voltages
Short-Circuit Protection
Shutdown Quiescent Current: <1μA
SOT-23-5L Package (lead-free package)
三,应用范围 (Applications)

Digital Cameras and MP3
Palmtop Computers / PDAs
Cellular Phones
Wireless Handsets and DSL Modems
PC Cards
Portable Media Players
四.技术规格书下载（产品PDF）

JTMH1223

JTMH1223A

五,产品封装图 (Package)

六.电路原理图

七,功能概述

Input Supply Voltage .....................................................................................................–0.3V ～ 6V
EN, FB Voltages .......................................................................................................... –0.3V ～ VIN
SW Voltage .................................................................................................... –0.3V ～ (VIN + 0.3V)
Peak SW Sink and Source Current................................................................................................ 3A
Operating Temperature Range (Note 2)...................................................................–40℃ ～ +85℃
Storage Temperature Range..................................................................................–65℃ ～ +150℃
Lead Temperature (Soldering, 10 sec)....................................................................................+265℃
Junction Temperature Range…………………………………………………………–40℃ ～ +125℃
Power Dissipation, PD @ TA = 25°C …………………………………………………………..…0.346W

ESD Susceptibility

HBM (Human Body Mode) ……………………………………………………………………………..2KV
MM (Machine Mode) …………………………………………………………………………………… 50V
八,相关芯片选择指南

JTMH1002

JTMH1039A

JTMH1001

JTMH1006

JTMH1223A

JTMH1223

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