The jtm9266 is a compact, high efficiency, and low voltage s

1.产品概述         2.产品特点
3.应用范围       4.下载产品资料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 jtm9266 is a compact, high efficiency, and low voltage step-upDC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents.
It operates in stable waveforms without external compensation.The low start-up input voltage below 1V makes jtm9266 suitable for 1 to 4 battery cells applications of providing up to 300mA output current. The 450KHz high switching rate minimized the size of external components. Besides, the 17µA low quiescent current together with high efficiency maintains long battery lifetime. The output voltage is set with two external resistors. Both internal 2A switch and driver for driving external power devices (NMOS or NPN) are provided.

二.产品特点(Features)
1.0V Low Start-up Input Voltage
High Supply Capability to Deliver 3.3V 100mA with 1 Alkaline Cell
17uA Quiescent (Switch-off) Supply Current
Zero Shutdown Mode Supply Current
90% Efficiency
450kHz Fixed Switching Frequency
Providing Flexibility for Using Internal and External Power Switches
Small SOT-26 ， SOT89-5 Package

三,应用范围 (Applications)

PDA
DSC
LCD Panel
MP3
Portable Instrument
Wireless Equipment

RF-Tags

四.下载产品资料PDF文档

jtm9266

五,产品封装图 (Package)

六.电路原理图

七,功能概述

Item	Symbol	Condition	Min.	Typ.	Max.
Output voltage	VOUT	-	VOUT(s) ×0.98	VOUT(s)	VOUT(S) ×1.02
Input Voltage	VIN	-	-	-	10
Operation start voltage	VST	IOUT=1mA	-	0.95	1.05
OSC start voltage	VST2	No external parts, Voltage applied to VOUT, CONT pin pulled up to VOUT via 300 & resistor	-	-	0.8
Shut down current	IOFF	CE=0,VIN=4.5V	－	0.01	1
Switch-off Current	Iswitch -off	VIN=6V	－	17	25
Continuous Switching Current	Iswitch	VIN=CE=3.3V,VFB=GND	180	250	400
No load Current	Ino-loa d	VIN=1.5V,VOUT=3.3V	－	70	－
Feedback Reference Voltage	Vref	Close Loop Vdd=3.3V	1.225	1.25	1.275
Switching Frequency	Fs	Vdd=3.3V	380	450	520

(责任编辑：oumao18)