The JTM8021 are high-efficiency 1.5MHz synchronous step-down

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 JTM8021 are high-efficiency 1.5MHz synchronous step-down DC-DC
regulator ICs capable of delivering up to 1.5A output currents, respectively. The
JTM8021 operates over a wide input voltage range from 3V to 5.5V and integrate
main switch and synchronous switch with very low RDS(ON) to minimize the
conduction loss. Low output voltage ripple and small external inductor and
capacitor sizes are achieved with 1.5MHz switching frequency.
二.产品特点(Features)

low Rds(on) for internal switches (top/bottom):
3-5.5V input voltage range
1.5MHz switching frequency minimizes
the external components
Internal softstart limits the inrush current
100% dropout operation
Compact and thermally enhanced package:
SOP8-PP
三,应用范围 (Applications)

LCD TV WiFi
Card GPS
Access Point Router
Set Top Box
四.技术规格书下载（产品PDF）

JTM8021

五,产品封装图 (Package)

Pin Number	Pin Name	Description
7,5	EN1,2	Enable Pin. EN is a digital input that turns the regulator on or off .Drive EN pin high to turn on the regulator, drive it low to turn it off.
Exposed paddle	GND	Ground Pin..
2,4	LX1,2	Power Switch Output Pin. SW is the switch node that supplies power to the output.
1,3	IN1,2	Input pin. Decouple this pin to GND paddle with at least 10uF ceramic cap.
8,6	FB1,2	Feedback Pin. Through an external resistor divider network, FB senses the output voltage and regulates it. The feedback threshold voltage is 0.6V.

六.电路原理图

七,功能概述

Parameter	Symbol	Value	Unit
Input Voltage	VIN	-0.3 to 6	V
Feedback Pin Voltage	VFB	Vin+0.6	V
Enable Pin Voltage	VEN	Vin+0.6	V
Power Dissipation	PD	Internally limited	mW
Operating Junction Temperature	TJ	150	ºC
Storage Temperature	TSTG	-65 to 150	ºC
Lead Temperature (Soldering, 10 sec)	TLEAD	260	ºC
ESD (HBM)		2000	V
MSL		Level3
Thermal Resistance-Junction to Ambient	RθJA	50	ºC / W
Thermal Resistance-Junction to Case	RθJC	10	ºC / W

八,相关芯片选择指南

双路同步DC-DC降压IC

型号	输入耐压	输出电压	输出电流	反馈电压	工作频率	效率	静态工作电流	待机电流	封装
JTM8021	3.0V-6.0V	双路可调	1.5A	0.6V	1.5MHz	90%		10uA	ESOP-8
JTM8022	2.3V-6.0V	双路可调	2A	0.6V	1.5MHz	90%	150uA	0.1uA	ESOP-8

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