The JTMA7066, JTMA7067N has two synchronous buck PWM control(2)

15.)Short-Circuit Protection for VOUT1 and VOUT2
16.)Thermally Enhanced TSSOP-24P and QFN5x5-32 Packages
17.)Lead Free and Green Devices Available (RoHS Compliant)

三,应用范围 (Applications)
Graphic Cards
DDR memory Power Supplies
Low-Voltage Distributed Power Supplies

四.下载产品资料PDF文档

jtma7066

JTMA7076N

五,产品封装图 (Package)

FUNCTION
NAMEFUNCTION
These pins are the outputs of error amplifiers of their respective regulators. They are
used to set the compensation components.
These pins provide two functions. Connect a capacitor to the GND for setting the
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the
respective output, leave open to enable the respective output.
These pins provide two functions. Connect a capacitor to the GND for setting the
soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the
respective output, leave open to enable the respective output.

PIN			FUNCTION
NO.		NAME
TSSOP-24P		NAME
DFN5x5-32
1
29	FB1	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.
2	30	COMP1	These pins are the outputs of error amplifiers of their respective regulators. They are used to set the compensation components.
3	31	COMP2
4
32	FB2	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.
5	1	REFIN	This pin is the reference input voltage of error amplifier of the VOUT2. It also provides the voltage into a buffer, which is out on the REFOUT pin.
6	3	REFOUT	This pin provides a buffed voltage, which is from REFIN pin. In Independent mode, it can be used by other ICs. In DDR mode, it is from the VOUT1, and can be used as the VTT buffer. This pin also uses to select the phase shift (see table1). When this pin pulls to VCC, the buffer is disabled and the REFOUT is not available for use. It is recommended that a 0.1µF capacitor is connected to the ground for stability.
7	4	SS1/EN1	These pins provide two functions. Connect a capacitor to the GND for setting the soft-start time. Use an open drain logic signal to pull the SS/EN pin low to disable the respective output, leave open to enable the respective output.
8	5	SS2/EN2
9
6	SS3/EN3
10
7	VREF	This pin provides a 3.3V reference voltage, which can be used by the REFIN pin or other ICs as a voltage reference. It is recommended that a 1µF capacitor is connected to ground for stability.
11	8	DRIVE3	This pin drives the gate of an external N-channel MOSFET for linear regulator.
12	10	FB3	These pins are the inverting inputs of the error amplifiers of their respective regulators. They are used to set the output voltage and the compensation components.
13	11	FS/SYNC	This pin is used to adjust the switching frequency. Connecting a resistor from FS/SYNC pin to the ground increases the switching frequency. Conversely, connecting a resistor from this pin to the VCC12 reduces the switching frequency. In addition, this pin also provides synchronous frequency function. An external clock can be fed into this pin, and force the switching frequency to follow the external clock.
14	12	PGOOD	This pin is an open drain device; connect a pull up resistor to the VCC for PGOOD function.
15	13	GND	This pin is the signal ground pin. The metal thermal pad under the package is the IC substrate; connects the GND pin and metal thermal pad together on the board, and ties to the good GND plane for electrical and thermal conduction.
16	16	BOOT2	These pins provide the bootstrap voltage to the gate driver for driving the upper MOSFETs. It can be connected to a power voltage directly, but the difference voltage between the BOOT and VIN must be high enough to drive the upper MOSFETs.
17	14	UGATE2	These pins provide the gate driver for the upper MOSFETs of VOUT1 and VOUT2.
18	18,23	PGND	This pin is the power ground pin for the gate driver and linear driver circuit. It should be tied to the GND.
19	20	LGATE2	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.
20	21	LGATE1	These pins provide the gate driver for the lower MOSFETs of VOUT1 and VOUT2.
21	19, 22	VCC12	Power supply input pin. Connect a nominal 12V power supply to this pin for the gate driver. It is recommended that a decoupling capacitor (1 to 10µF) is connected to the GND for noise decoupling.

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