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參數資料
| 型號： | LTC3112IFE#PBF |
| 廠商： | LINEAR TECHNOLOGY CORP |
| 元件分類： | 穩(wěn)壓器 |
| 英文描述： | 12 A SWITCHING REGULATOR, 825 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封裝： | 4.40 MM, LEAD FREE, PLASTIC, TSSOP-20 |
| 文件頁數： | 32/32頁 |
| 文件大?。?/td> | 651K |
| 代理商： | LTC3112IFE#PBF |
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LTC3112
9
3112f
PIN FUNCTIONS
COMP (Pin 1/Pin 2): Error Amp Output. An R-C network
connected from this pin to FB sets the loop compensation
for the voltage converter.
FB (Pin 2/Pin 3): Feedback Voltage Input. Connect VOUT
resistor divider tap to this pin. The output voltage can be
adjusted from 2.5V to 14V by the following equation:
VOUT = 0.8V 1+
R1
R2
where R1 is the resistor between VOUT and FB and R2 is
the resistor between FB and GND.
OVP (Pin 3/Pin 4): Overvoltage Protection Input. The
common point of a resistor divider between VOUT and GND
can also be used to program the overvoltage protection
to a lower voltage by the following equation:
VOVP = 0.83V 1+
R3
R4
where R3 is the resistor between VOUT and OVP and R4
is the resistor between OVP and GND.
VIN (Pins 4, 5/Pins 5, 6): Input Supply Voltage. This pin
should be bypassed to the ground plane with at least
10μF of low ESR, low ESL ceramic capacitance. Place this
capacitor as close to the pin as possible and have as short
a return path to the ground plane as possible.
RUN (Pin 6/Pin 7): Shutdown Control Input. Operation
will be disabled when the voltage is forced below 0.75V
(typical) and less than 1μA of quiescent current will be
consumed.
IOUT (Pin 7/Pin 8): A Current approximately 24μA/A of
the D Switch Output Current is Sourced from this Pin.
An R-C circuit can be used to control the average output
current or provide an analog output current monitor (see
Applications Information section).
VOUT (Pin 8/Pin 9): Regulated Output Voltage. This pin
should be connected to a low ESR ceramic capacitor of
at least 47μF. The capacitor should be placed as close to
the pin as possible and have a short return to the ground
plane.
SW2 (Pins 9, 10/Pins 12, 13): Internal switches C and D
and the external inductor are connected here.
BST2 (Pin 11/Pin 14): Boosted Floating Driver Supply
for D-Switch Driver. Connect a 0.1μF capacitor from this
pin to SW2.
SW1 (Pins 12, 13/Pins 15, 16): Internal switches A and
B and the external inductor are connected here.
BST1 (Pin 14/Pin 17): Boosted Floating Driver Supply
for A-Switch Driver. Connect a 0.1μF capacitor from this
pin to SW1.
VCC (Pin 15/Pin 18): External Capacitor Connection for
the Regulated VCC Supply. This supply is used to operate
internal circuitry and switch drivers. VCC will track VIN up
to 4.2V, but will maintain this voltage when VIN > 4.2V.
Connect a 1μF ceramic capacitor from this pin to GND.
PWM/SYNC (Pin 16/Pin 19): Burst Mode Control and
Synchronization Input. A DC voltage <0.5V commands
Burst Mode operation, >1.5V commands 750kHz xed
frequency mode. A digital pulse train between 300kHz
and 1500kHz applied to this pin will override the internal
oscillator and set the operating frequency. The pulse train
should have minimum high or low times greater than 100ns
(Note 7). Note the LTC3112 has reduced power capability
when operating in Burst Mode operation. Refer to the
Operation section of this data sheet for details.
GND (Exposed Pad Pin 17/Pins 1, 10, 11, 20, Exposed
Pad Pin 21): Ground. Small-Signal and Power Ground
for the IC. The exposed pad must be soldered to the PCB
and electrically connected to ground through the shortest
and lowest impedance connection possible. The bulk of
the heat ow is through this pad, so printed circuit board
design has an impact on the thermal performance of the
IC. See PCB Layout and Thermal Considerations sections
for more details.
(DFN/TSSOP)
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| LTC3112EFE#PBF | 12 A SWITCHING REGULATOR, 825 kHz SWITCHING FREQ-MAX, PDSO20 |
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| LTC3112EDHD#TRPBF | 12 A SWITCHING REGULATOR, 825 kHz SWITCHING FREQ-MAX, PDSO16 |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LTC3113 | 制造商:LINER 制造商全稱:Linear Technology 功能描述:40V, 2A Synchronous Buck-Boost DC/DC |
| LTC3113EDHD#PBF | 功能描述:IC REG BUCK BOOST ADJ 3A 16DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3113EDHD#TRPBF | 功能描述:IC REG BUCK BOOST ADJ 3A 16DFN RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3113EFE#PBF | 功能描述:IC REG BUCK BOOST ADJ 3A 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
| LTC3113EFE#TRPBF | 功能描述:IC REG BUCK BOOST ADJ 3A 20TSSOP RoHS:是 類別:集成電路 (IC) >> PMIC - 穩(wěn)壓器 - DC DC 開關穩(wěn)壓器 系列:- 設計資源:Design Support Tool 標準包裝:1 系列:- 類型:升壓（升壓） 輸出類型:固定 輸出數:1 輸出電壓:3V 輸入電壓:0.75 V ~ 2 V PWM 型:- 頻率 - 開關:- 電流 - 輸出:100mA 同步整流器:是 工作溫度:-40°C ~ 85°C 安裝類型:表面貼裝 封裝/外殼:SOT-23-5 細型，TSOT-23-5 包裝:剪切帶 (CT) 供應商設備封裝:TSOT-23-5 其它名稱:AS1323-BTTT-30CT |
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