Inductor Built-in The JTMT211/JTMT212 series is a synchronou

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 JTMT211/JTMT212 series is a synchronous step-down micro DC/DC converter which integrates an
inductor and a control IC in one tiny package (3.1mm×4.7mm, h=1.3mm).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 2.7V to 6.0V enables support for applications that require an externally set output voltage can
be selected. The JTMT211/JTMT212 series uses synchronous rectification at an operating frequency of
2.4MHz. PWM control(JTMT211) or automatic PWM/PFM switching control (JTMT212) can be selected.
The JTMT211 series has a fixed frequency,enabling the suppression of output ripple. The JTMT212 series
achieves high efficiency while holding down output ripple across the full range of loads, from light to heavy,
enabling the extension of battery operation time.
The series have a high speed soft-start as fast as 1ms in typical for quick turn-on. With the built-in UVLO
(Under Voltage LockOut) function, the internal P-channel driver transistor is forced OFF when input voltage
becomes 2.4V or lower. It’s suitable for large-current application due to limit current is configured 4.0A in
typical. 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 GND
pins. Due to CL discharge function, malfunction on LX is prevented when Stand-by mode
二.产品特点(Features)

Package Size : 3.1mm×4.7mm, h=1.3mm
Input Voltage : 2.7V～6.0V
Output Voltage : 0.9V～VIN (FB Voltage=0.8V±2%)
High Efficiency : 94% (VIN=5.0V, VOUT=3.3V)
Output Current : 2.0A
Oscillation Frequency : 2.4MHz (±15%)
Maximum Duty Cycle : 100%
Control Methods : PWM (XCL211) PWM/PFM (XCL212)
Functions : Current Limit Circuit (automatic return) Soft-Start Circuit Built-In CL Discharge, UVLO
Output Capacitor : Low ESR Ceramic Capacitor
Operating Ambient Temperature : -40℃～+85℃
Package : USP-11B01
Environmental Friendly : EU RoHS Compliant, Pb Free
三,应用范围 (Applications)

●Note PCs
●Printers
●Tablet PCs
●PND(Portable Navigation Device)
四.技术规格书下载（产品PDF）

JTMT211/JTMT212 Series

五,产品封装图 (Package)

PIN NUMBER	PIN NAME	FUNCTIONS
1	NC	No Connection
2	Lx	Switching Output
3	Lx	Switching Output
4	NC	No Connection
5	FB	Output Voltage Monitor
6	CE	Chip Enable
7	AVIN	Analog Input
8	GND	Ground
9	PVIN	Power Input
10	L1	Inductor Electrodes
11	L2	Inductor Electrodes

六.电路原理图

JTMT211/JTMT212 TYPICAL APPLICATION CIRCUIT

七,功能概述

(*1)
-0.3 ~ +7.0V

PARAMETER		SYMBOL	RATINGS	UNIT
PVIN Pin Voltage		VPVIN	(*1) -0.3 ~ +7.0	V
AVIN Pin Voltage		VAVIN	(*1) -0.3 ~ +7.0	V
CE Pin Voltage
VCE	-0.3 ~ +7.0	V
FB Pin Voltage		VFB	-0.3 ~ +7.0	V
Lx Pin Voltage		VLx	(*2) -0.3 ~ +7.0 or VPVIN +0.3	V
Lx Pin Current		ILx	(*3) ±6.0	A
Power Dissipation	USP-11B01	Pd	1000	mW
Operating Ambient Temperature		Topr	-40 ~ +85	℃
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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