参数资料
| 型号： | MC34703PNB |
| 厂商： | Freescale Semiconductor |
| 文件页数： | 16/46页 |
| 文件大小： | 0K |
| 描述： | IC POWER SUPPLY QUICC 33-QFN |
| 标准包装： | 1 |
| 应用： | 电源 |
| 电流 - 电源： | 60mA |
| 电源电压： | 2.8 V ~ 13.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 33-PowerQFN |
| 供应商设备封装： | 33-PQFN（10x10） |
| 包装： | 管件 |
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FUNCTIONAL DESCRIPTION
FUNCTIONAL PIN DESCRIPTION
LINEAR REGULATOR PIN (LDO)
Input pin of the linear regulator power sequence control
LINEAR FEEDBACK PIN (LFB)
Linear regulator feedback pin.
circuit.
OUTPUT VOLTAGE PIN (VOUT)
BOOST DRAIN PIN (VBD)
Drain of the internal boost regulator power MOSFET.
VBST (SENSE)
Sense pin of the internal boost regulator output voltage.
SERIAL DATA PIN (SDA)
I 2 C bus pin. Serial data.
CLOCK SYNCHRONIZATION PIN (CLKSYN)
Oscillator output/synchronization input pin.
Output voltage of the buck converter. Input pin of the
switching regulator power sequence control circuit.
ERROR AMP INVERTING INPUT PIN (INV)
Buck Controller Error Amplifier inverting input.
BUCK SWITCHER COMPENSATION (COMP)
Output voltage of the buck converter error amplifier.
Compensation pin.
SWITCH PINS (SW)
Buck regulator switching node. This pin is connected to the
inductor.
VDD FILTER PIN (VDDI)
Internal Logic Supply Voltage Pin: a low-ESR 1.0 μ F 6.0 V
capacitor must be connected between this pin and signal
POWER GROUND PINS (PGND)
Buck regulator power ground.
ground.
INPUT VOLTAGE 2 PINS (VIN2)
RESET TIMER PIN (RT)
The Reset Timer power-up delay (RT) pin is used to set
the delay between the time when the LDO and switcher
outputs are active and stable and the RST output is released.
An external resistor and capacitor are used to program the
timer. The power-up delay can be obtained by using the
following formula:
t D ~ 10 ms + R t C t
Where R t is the Reset Timer programming resistor and C t
is the Reset Timer programming capacitor, both connected in
parallel from RT to ground.
Buck regulator power input. Drain of the high-side power
MOSFET.
BOOTSTRAP PIN (BOOT)
Bootstrap capacitor input.
SWITCHER SLEW RATE CONTROL (SR)
Buck slew rate control pin. For faster Slew Rates, connect
the pin to the boot pin (Boot). For medium speeds, the pin
should be left open. For slowest options, connect the pin to
the Switch Pin (SW).
LINEAR DRIVE PIN (LDRV)
LDO gate drive of the external pass N-channel MOSFET.
34703
Analog Integrated Circuit Device Data
16
Freescale Semiconductor
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| MC34704AEPR2 | 功能描述:开关变换器、稳压器与控制器 DSC8 PASS1.3 TAPE RoHS:否 制造商:Texas Instruments 输出电压:1.2 V to 10 V 输出电流:300 mA 输出功率: 输入电压:3 V to 17 V 开关频率:1 MHz 工作温度范围: 安装风格:SMD/SMT 封装 / 箱体:WSON-8 封装:Reel |
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