TPPM0115集成电路（IC）的PMIC-稳压器-DCDC开关式控制器规格书PDF中文资料

TPPM0115属于集成电路（IC）的PMIC-稳压器-DCDC开关式控制器。由美国德州仪器公司制造生产的TPPM0115DC-DC 开关控制器PMIC（电源管理集成电路）DC 到 DC 开关式控制器是用于高效率电路的稳压 IC，其配置为生成高于（突升或步升）或低于（突降或步降）输入电源的输出电源电压。其他拓扑结构可能包括：降压-升压、反激、正激、Cuk、SEPIC、全桥、半桥和推挽式。这些器件不同于需要最小电压并“烧尽”多余电压的线性稳压器。

features

DC-DC Synchronous Buck Controller

Switching Frequency, 200 kHz (Typ)

Programmable Output Voltage,

1 V to 2.5 V ±2%

Power Good Function (PWRGD)

Input Voltage, 12 V ±5%

Drive High Load Current With External

Components

description

The TPPM0115 is a synchronous buck controller capable of driving two external power FETs 180° out of phase.

The device requires a minimum of external standard filter components and switching FETs to regulate the

desired output voltage. This is achieved with an internal switching frequency of 200 kHz (typical).

The TPPM0115 switch mode controller and associated circuitry provide efficient voltage regulation of greater

than 85%. The output voltage is set by two external resistors. During power up, when the output voltage reaches

90% of the desired value, the power good (PWRGD) output is transitioned high after a short delay of 1 ms to

5 ms. During power down, when the output voltage falls below 90% of the set value, the PWRGD output is pulled

low without any delay.

In the event the set output is in an over-voltage condition due to a system fault, the drive to the lower FET turns

on to correct the fault. There is a dead time between switching one FET ON while the other FET is switching

OFF to prevent cross conduction.

The TPPM0115 is capable of driving high static load currents with minimal ripple on the output (<2%). The phase

sense input is used to sense the flow of current through the inductor during flyback to minimize ripple on the

output.

To optimize output filter capacitance, the voltage mode control is based on a fixed ON time during the start of

the cycle and hysteretic control during load transients. This allows the device to respond and maintain the set

regulation voltage.

applications

PC Motherboard, Voltage Regulation for

System Power

DDR Memory Supply (VDDQ or VTT)

RDRAM Memory Supply (VDDQ)

General Purpose Synchronous Switch

Mode Controller