Inductor Built-in JTMT221/JTMT222 synchronous step-down mic

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 JTMT221/JTMT222 series is a synchronous step-down micro DC/DC converter which integrates an inductor and a control
IC in one tiny package (2.0mm×2.5mm, h=1.0mm). An internal coil simplifies the circuit and enables minimization of noise and other
operational trouble due to the circuit wiring. A wide operating voltage range of 2.5V to 5.5V enables support for applications that require
an internally fixed output voltage (0.8V to 3.6V). The JTMT221/JTMT222 series uses synchronous rectification at an operating frequency
of 1.2MHz. The JTMT221/JTMT222 series uses HiSAT-COT (*) synchronous rectification. HiSAT-COT+PWM control (JTMT221) or
HiSAT-COT+automatic PWM/PFM switching control (JTMT222) can be selected.
The series have a high speed soft-start as fast as 0.25ms (TYP.) in typical for quick turn-on. With the built-in UVLO (Under Voltage Lock
Out) function, the internal P-channel driver transistor is forced OFF when input voltage becomes 2.0V or lower. When CE=Low, the integrated
CL discharge function which enables the electric charge at the output capacitor CL to be discharged via the internal discharge switch located between the LX and PGND pins. The power consumption will be less than 1.0μA.
二.产品特点(Features)

nput Voltage	2.5V～5.5V
Output Voltage	0.8V～3.6V (±2.0%)
Oscillation Frequency	1.2MHz
Output Current	0.5A
Efficiency	93% (VIN=5.0V,VOUT=3.3V/200mA)
Control Methods	HiSAT-COT制御 100% Duty Cycle PWM (JTMT221) PWM/PFM (JTMT222)
Circuit Protection	Thermal Shut Down Current Limit Circuit (Drop) Short Circuit Protection (Latch)
Functions	Soft-start Circuit Built-in UVLO CL Discharge
Output Capacitor	Low ESR Ceramic Capacitor
Operating Ambient Temperature	-40℃～+105℃
Package	CL-2025-02
Environmental Friendly	EU RoHS Compliant, Pb Free

三,应用范围 (Applications)

●Wearable Device
●Bluetooth Module
●SSD(Solid State Drive)
●Mobile phone
●Digital still camera
●Portable game devices
四.技术规格书下载（产品PDF）

JTMT221/JTMT222

五,产品封装图 (Package)

PIN NUMBER	PIN NAME	FUNCTIONS
1	Lx	Switching Output
2	AGND	Analog Ground
3	VOUT	Fixed Output Voltage PIN
4	CE	Chip Enable
5	PGND	Power Ground
6	VIN	Power Input
7	L1	Inductor Electrodes
8	L2	Inductor Electrodes

六.电路原理图

JTMT221/JTMT222 TYPICAL APPLICATION CIRCUIT

七,功能概述

PARAMETER	SYMBOL	RATINGS	UNITS
VIN Pin Voltage	VIN	-0.3 ~ + 6.2	V
LX Pin Voltage	VLx	(*1) - 0.3 ~ VIN + 0.3 or + 6.2	V
VOUT Pin Voltage	Vout	(*2) - 0.3 ~ VIN + 0.3 or + 4.0	V
CE Pin Voltage	VCE	- 0.3 ~ + 6.2	V
Power Dissipation	Pd	(*3) 1000	mW
Operating Ambient Temperature	Topr	- 40 ~ + 105	℃
Storage Temperature	Tstg	- 55 ~ + 125	℃

八,相关芯片选择指南

系列名称	特点	输入电压		输出电压		最大输出电流	振荡频率	内置FET	封装
		(V)		(V)		(mA)
		最小	最大	最小	最大
JTMT101XCL	Inductor Built-in Step-up	0.9	5.5	1.8	5	100	1.2MHz	P-ch FET	CL-2025
								N-ch FET	CL2025-02
JTMT201XCL	Inductor Built-in	2	6	0.8	4	400	1.2MHz	N-ch FET	CL-2025
JTMT202XCL								P-ch FET	CL2025-02
JTMT205XCL	Inductor Built-in	2	6	0.8	4	600	3.0MHz	N-ch FET	CL-2025
JTMT206XCL								P-ch FET	CL2025-02
JTMT207XCL
JTMT208XCL	Inductor Built-in	1.8	6	0.8	4	400	3.0MHz	N-ch FET	USP-10B03
JTMT209XCL								P-ch FET
JTMT210XCL	Inductor Built-in	2	6	1	4	-	-	Pch	CL2025-02
								Nch
JTMT211XCL	Inductor Built-in	2.7	6	0.9~VIN		2000	2.4MHz	N-ch FET	USP-11B01
JTMT212XCL								P-ch FET
JTMT213XCL	Inductor Built-in	2.7	5.5	0.8	3.6	1500	3.0MHz	N-ch FET	USP-9B01
JTMT214XCL								P-ch FET
JTMT219XCL	Inductor Built-in	2.5	5.5	0.8	3.6	1000	3.0MHz	N-ch FET	CL2025-02
JTMT220XCL								P-ch FET

JTMT221XCL	Inductor Built-in	2.5	5.5	0.8	3.6	500	1.2MHz	N-ch FET	CL2025-02
JTMT222XCL								P-ch FET

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