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参数资料
| 型号： | LT3782AEFE |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | SWITCHING CONTROLLER, PDSO28 |
| 封装： | 4.40 MM, PLASTIC, TSSOP-28 |
| 文件页数： | 17/20页 |
| 文件大小： | 233K |
| 代理商： | LT3782AEFE |
LT3782A
6
3782af
SGATE2 (Pin 1/Pin 26): Second Phase Synchronous Drive
Signal. An external driver buffer is needed to drive the top
synchronous power FET.
SGATE1 (Pin 2/Pin 27): First Phase Synchronous Drive
Signal. An external driver buffer is needed to drive the top
synchronous power FET.
GND (Pin 4/Pin 28): Ground.
SYNC (Pin 5/Pin 1): Synchronization Input. The pulse
width can range from 10% to 70%. Note that the operating
frequency is half of the sync frequency.
DELAY (Pin 6/Pin 2): When synchronous drivers are used,
the programmable delay that delays BGATE turns on after
SGATE turns off.
DCL (Pin 7/Pin 3): This pin programs the limit of the maxi-
mum duty cycle. When connected to VRSET, it operates at
natural maximum duty cycle, approximately 90%.
SENSE1+ (Pin 8/Pin 4):
First Phase Current Sense Amplier
Positive Input. An RC lter is required across the current
sense resistor. Current limit threshold is set at 63mV.
SENSE1– (Pin 9/Pin 5):
First Phase Current Sense Amplier
Negative Input. An RC lter is required across the current
sense resistor.
SLOPE (Pin 10/Pin 6): A resistor from SLOPE to GND
increases the internal current mode PWM slope com-
pensation.
RSET (Pin 11/Pin 7): A resistor from RSET to GND sets the
oscillator charging current and the operating frequency.
SENSE2– (Pin 12/Pin 8):
Second Phase Current Sense
Amplier Negative Input. An RC lter is required across
the current sense resistor.
SENSE2+ (Pin 13/Pin 10):
Second Phase Current Sense
Amplier Positive Input. An RC lter is required across
the current sense resistor. Current limit threshold is set
at 63mV.
SS (Pin 14/Pin 11): Soft-Start. A capacitor on this pin sets
the output ramp up rate. The typical time for SS to reach
the programmed level is (C 2.44V)/10μA.
VC (Pin 15/Pin 12): The output of the gm error amplier and
the control signal of the current loop of the current-mode
PWM. Switching starts at 0.7V, and higher VC voltages
corresponds to higher inductor current.
FB (Pin 16/Pin 13): Error Amplier Inverting Input. A
resistor divider to this pin sets the output voltage.
RUN (Pin 17/Pin 14): LT3782A goes into shutdown mode
when VRUN is below 2.2V and goes to low bias current
shutdown mode when VRUN is below 0.3V.
VEE2 (Pin 19/Pin 16): Gate Driver BGATE2 Ground. This
pin should be connected to ground as close to the IC as
possible.
BGATE2 (Pin 20/Pin 17): Second Phase MOSFET Driver.
GBIAS2 (Pin 21/Pin 18): Bias for Gate Driver BGATE2.
Should be connected to GBIAS or an external power supply
between 12V to 14V. A bypass low ESR capacitor of 2μF
or larger is needed and should be connected directly to
the pin to minimize parasitic impedance.
GBIAS1 (Pin 22/Pin 21): Bias for Gate Driver BGATE1.
Should be connected to GBIAS2.
BGATE1 (Pin 23/Pin 22): First Phase MOSFET Driver.
VEE1 (Pin 24/Pin 23): Gate Driver BGATE1 Ground. This
pin should be connected to ground as close to the IC as
possible.
VCC (Pin 27/Pin 24): Chip Power Supply. Good supply
bypassing is required.
GBIAS (Pin 28/Pin 25): Internal 11V regulator output for
biasing internal circuitry. Should be connected to GBIAS1
and GBIAS2.
Exposed Pad (Pin 29/Pin 29): The exposed package pad
is fused to internal ground and is for heat sinking. Solder
the bottom metal plate onto expanded ground plane for
optimum thermal performance. This pad should be con-
nected to ground as close to the IC as possible.
NC (Pins 3, 18, 25, 26/Pins 9, 15, 19, 20): Not Connected.
Can be connected to GND.
(FE/UFD)
PIN FUNCTIONS
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT3782AEFE#PBF | 功能描述:IC REG CTRLR BST PWM CM 28-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 特色产品:LM3753/54 Scalable 2-Phase Synchronous Buck Controllers 标准包装:1 系列:PowerWise® PWM 型:电压模式 输出数:1 频率 - 最大:1MHz 占空比:81% 电源电压:4.5 V ~ 18 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-5°C ~ 125°C 封装/外壳:32-WFQFN 裸露焊盘 包装:Digi-Reel® 产品目录页面:1303 (CN2011-ZH PDF) 其它名称:LM3754SQDKR |
| LT3782AEFE#PBF | 制造商:Linear Technology 功能描述:Switch Regulator IC |
| LT3782AEFE#TRPBF | 功能描述:IC REG CTRLR BST PWM CM 28-TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 稳压器 - DC DC 切换控制器 系列:- 标准包装:4,500 系列:PowerWise® PWM 型:控制器 输出数:1 频率 - 最大:1MHz 占空比:95% 电源电压:2.8 V ~ 5.5 V 降压:是 升压:无 回扫:无 反相:无 倍增器:无 除法器:无 Cuk:无 隔离:无 工作温度:-40°C ~ 125°C 封装/外壳:6-WDFN 裸露焊盘 包装:带卷 (TR) 配用:LM1771EVAL-ND - BOARD EVALUATION LM1771 其它名称:LM1771SSDX |
| LT3782AEFE-PBF | 制造商:LINER 制造商全称:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller |
| LT3782AEFE-TR | 制造商:LINER 制造商全称:Linear Technology 功能描述:2-Phase Step-Up DC/DC Controller |
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