JTMT205/JTMT206/JTMT207 series is a synchronous step-down m

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 JTMT205/JTMT206/JTMT207 series is a synchronous step-down micro DC/DC converter which
integrates an inductor and a control IC in one tiny package (2.5mm×2.0mm, H=1.0mm). A stable power supply
with an output current of 600mA is configured using only two capacitors connected externally.
Operating voltage range is from 2.0V to 6.0V(JTMT20xG:1.8V～6.0V). Output voltage is internally set in a range
from 0.8V to 4.0V in increments of 0.05V. The device is operated by 3.0MHz, and includes 0.42ΩP-channel
driver transistor and 0.52Ω N-channel switching transistor. As for operation mode, the JTMT205 series is PWM
control, the JTMT206 series is automatic PWM/PFM switching control and the JTMT207 series can be manually
switched between the PWM control mode and the automatic PWM/PFM switching control mode, allowing fast
response, low ripple and high efficiency over the full range of loads (from light load to heavy load). During
stand-by, the device is shutdown to reduce current consumption to as low as 1.0μA or less. With the built-in
UVLO (Under Voltage Lock Out) function, the internal driver transistor is forced OFF when input voltage
becomes 1.4V or lower. JTMT205B(G,F)/JTMT206B(G,F)/JTMT207B(G,F) series provide short-time turn-on
by the soft start function internally set in 0.25 ms (TYP). JTMT205B(C,G,F) /JTMT206 B(C,G,F) / JTMT207B(C,G,F)
integrate CL auto discharge function which enables the electric charge stored at the output capacitor CL to be
discharged via the internal auto-discharge switch located between the LX and VSS pins. When the devices enter
stand-by mode, output voltage quickly returns to the VSS level as a result of this function.
二.产品特点(Features)

Ultra Small :	2.5mm×2.0mm, H=1.0mm
Input Voltage :	2.0V ~ 6.0V(A/B/C Type) 1.8V ~ 6.0V(G/F Type)
Output Voltage :	0.8V ~ 4.0V (+2.0%)
High Efficiency :	90% (VIN=4.2V, VOUT=3.3V)
Output Current :	600mA
Oscillation Frequency :	3.0MHz (+15%)
Maximum Duty Cycle : Capacitor : CE Function : Protection Circuits	100% Low ESR Ceramic Active High Soft-Start Circuit Built-In CL High Speed Auto Discharge :Current Limiter Circuit Built-In (Constant Current & Latching)
Control Methods :	PWM (JTMT205)
	PWM/PFM Auto (JTMT206)
	PWM/PFM Manual (JTMT207)
Operating Ambient Temperature : Environmentally Friendly :	-40℃～+85℃ EU RoHS Compliant, Pb Free

三,应用范围 (Applications)

●Mobile phones, Smart phones
●Bluetooth Headsets
●WiMAX PDAs, MIDs, UMPCs
●Portable game consoles
●Digital cameras, Camcorders
●Electronic dictionaries
四.技术规格书下载（产品PDF）

JTMT205/JTMT206/JTMT207 Series

五,产品封装图 (Package)

JTMT205/JTMT206/JTMT207 PIN CONFIGURATION

3

Inductor Electrodes

PIN NUMBER	PIN NAME	FUNCTIONS
1	Lx	Switching Output
2,5	VSS	Ground
3	VOUT	Fixed Output Voltage Pin (A/B/C/G types)
3	FB	Output Voltage Sense Pin (F type)
4	CE / MODE	Chip Enable & Mode Switch
6	VIN	Power Input
7	L1	Inductor Electrodes
8	L2	Inductor Electrodes

六.电路原理图

JTMT205/206/207 Series A/B/C/G Types TYPICAL APPLICATION CIRCUIT

七,功能概述

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

(责任编辑：oumao18)