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| 型号： | PM6652 |
| 厂商： | STMICROELECTRONICS |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, 600 kHz SWITCHING FREQ-MAX, QCC32 |
| 封装： | 5 X 5 MM, 1 MM HEIGHT, 0.50 MM PITCH, ROHS COMPLIANT, VFQFPN-32 |
| 文件页数： | 18/53页 |
| 文件大小： | 2519K |
| 代理商： | PM6652 |
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PM6652
Device description
Doc ID 16867 Rev 3
25/53
8
Device description
The PM6652 is a single phase, step-down controller which can be easily configured to
regulate power to IMPV6.5 and VR11 devices, as listed below:
●
The graphics (Render) core of the Intel mobile Arrandale processor used on Calpella
platform;
●
The low voltage and ultra low voltage mobile CPU, used on Calpella platform;
●
The VR11 compliant CPU, like Intel ATOM 200/300 and Pineview-D CPU.
The supply mode and platform compliance are selected by acting on two multi-function pins
(refer to Section 8.2: Mode selection on page 28 for details), before the device turn-on.
The PM6652 is based on constant on-time control architecture. This type of control offers a
very fast load transient response with a minimum external component count. A typical
application circuit is shown in Figure 1 on page 7. The controller includes a 7 bit digital-to-
analog converter (DAC) that provides a reference voltage according with the VID pins
droop) control, proportional to the inductor DCR or dedicated precision resistor, according to
IMVP6.5 specifications.
The switching frequency can be programmed in the range 200 kHz up to 600 kHz with an
external resistor connected to the input voltage (see Section 8.1: Constant on time PWM
control for details).
In order to maximize the efficiency at very light load, a pulse skipping control algorithm is
performed. The PM6652 is also fully compliant with the fast and slow render suspend state
exit mode, as required by IMVP 6.5 spec. for render core supply (see Section 8.6: Voltage
dynamic (VID) transitions on page 30 for details).
The device provides protection versus overvoltage, undervoltage, overcurrent and
overtemperature as well as power good (PWRGD), current monitor (IMON) and thermal
throttling (VRTT#) signals for monitoring purposes. The clock enable output signal
(CLKEN#), for appropriate platform power-up, is available in CPU supply mode only.
8.1
Constant on time PWM control
The PM6652 controller uses a pseudo-fixed frequency, Constant On-Time (COT) controller
as the core of the switching section. The COT controller uses a relatively simple algorithm,
exploiting the ripple voltage due to inductor resistance DCR (or due to a sense resistor
RSNS) to trigger the fixed on-time one-shot generator.
Nearly constant switching frequency is achieved by the system loop in steady-state
operating conditions, avoiding thus the need for a clock generator. A slight switching
frequency variation vs the load is the consequence of the switching regulator power losses,
which implies the off-time duration decrease.
The on-time one shot duration is directly proportional to the output voltage, sensed at VOUT
pin, and inversely proportional to the input voltage, sensed at the VOSC pin, as follows:
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相关代理商/技术参数 |
参数描述 |
|---|---|
| PM6652TR | 功能描述:DC/DC 开关控制器 Single Phase Cntrl Intel MVP 6.5 RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| PM6670 | 制造商:STMicroelectronics 功能描述: |
| PM6670AS | 功能描述:DC/DC 开关控制器 DDR 2/3 Memory Pwr Cntrl RoHS:否 制造商:Texas Instruments 输入电压:6 V to 100 V 开关频率: 输出电压:1.215 V to 80 V 输出电流:3.5 A 输出端数量:1 最大工作温度:+ 125 C 安装风格: 封装 / 箱体:CPAK |
| PM6670ASTR | 功能描述:直流/直流开关调节器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| PM6670ATR | 功能描述:直流/直流开关调节器 Complete DDR2/3 Mem Pwr supply controllr RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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