目录

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

Operating voltage range is from 2.0V to 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 1.2MHz, and includes 0.42ΩP-channel driver transistor and 0.52ΩN-channel switching transistor. As for
operation mode, the JTMT201XCL series is PWM control, the JTMT202XCL series is automatic PWM/PFM
switching control, 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.The series provide short-time turn-on by the soft start function
internally set in 0.25ms (TYP). The series 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

The JTMT201XCL/JTMT202XCL series consists of a reference voltage source, ramp wave circuit, error amplifier,
PWM comparator, phase compensation circuit, output voltage adjustment resistors, P-channel MOSFET driver
transistor, N-channel MOSFET switching transistor for the synchronous switch, current limiter circuit, UVLO circuit
with control IC, and an inductor. (See the block diagram below.) Using the error amplifier, the voltage of the internal
voltage reference source is compared with the feedback voltage from the VOUT pin through split resistors, R1 and R2.
Phase compensation is performed on the resulting error amplifier output, to input a signal to the PWM comparator to
determine the turn-on time during PWM operation. The PWM comparator compares, in terms of voltage level, the
signal from the error amplifier with the ramp wave from the ramp wave circuit, and delivers the resulting output to
the buffer driver circuit to cause the Lx pin to output a switching duty cycle. This process is continuously performed
to ensure stable output voltage.The current feedback circuit monitors the P-channel MOS driver transistor