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目录
一,产品概述(General Description)  The JTMH1002 is high efficiency synchronous,PWM step-down DC/DC converters working under an input voltage range from 2.2V to 5.5V. This feature makes the JTMH1002 suitable for single Li-Lon battery-powered applications. 100%duty cycle capability extends battery life in portable devices, while the quiescent current is200μA with no load, and drops to <1μA in shutdown. The internal synchronous switch is desired to increase efficiency without an external Schottky diode. The 1.0/1.4MHz switching frequency allows the using of tiny, low profile inductors and ceramic capacitors, which minimized overall solution footprint. The JTMH1002 converters are available in the industry standard SOT-23-5L power packages (or upon request). 二.产品特点(Features) Up to 95% Efficiency Current Mode Operation for Excellent Line and Load Transient Response Low Quiescent Current: 200μA Output Voltage: 0.6V ～ 5.5V Automatic PWM/PFM Mode Switching No Schottky Diode Required Frequency Operation: 1.0MHz For Fixed Output Voltage and 1.4MHz For Adjustable Output Voltage and Short-Circuit Protection Shutdown Quiescent Current: < 1μA Low Profile SOT-23-5L Package (lead-free packaging is now available) 三,应用范围 (Applications) Digital cameras and MP3 Palmtop computers / PDAs Cellular phones PC cards Portable media players 四.技术规格书下载（产品PDF）
五,产品封装图 (Package)  六.电路原理图  七,功能概述 Power Dissipation………………………………………………………………………Internally limited VIN …………………………………………………………………………………………..-0.3V ～ +6V V EN ……………………………………………..……………………...……-0.3V ～ (V IN + 0.3)V VSW …………………………………………………………………………………-0.3V ～ (VIN + 0.3)V VOUT…………………………………………………………………………………….....-0.3V ～ + 6V ISW ………………………………………………………………………………………………………..1.3A Operating Temperature Range(Note 2)………………………………………………...-40℃ ～ +85℃ Lead Temperature (Soldering, 10 sec.) ………………………………………………………..+265℃ Storage Temperature Range ……………………………………………………….-65℃ ～ +150℃ Junction Temperature …………………………………………………………………-40℃ ～ +125℃ 八,相关芯片选择指南
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