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参数资料
| 型号： | LT1683EG |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | Ultralow Noise Push-Pull DC/DC Controller |
| 中文描述： | SWITCHING CONTROLLER, 250 kHz SWITCHING FREQ-MAX, PDSO20 |
| 封装： | 5.30 MM, PLASTIC, SSOP-20 |
| 文件页数： | 12/24页 |
| 文件大小： | 237K |
| 代理商： | LT1683EG |
12
LT1683
1683f
There is also an on chip thermal shutdown circuit that will
turn off the outputs in the event the chip temperature rises
to dangerous levels. Thermal shutdown has hysteresis
that will cause a low frequency (<1kHz) oscillation to occur
as the chip heats up and cools down.
The chip has an undervoltage lockout feature that will
force the gate drivers low in the event that V
IN
drops below
2.5V. This insures predictable behavior during start up and
shut down. SHDN can be used in conjuction with an
external resistor divider to completely disable the part if
the input voltage is too low. This can be used to insure
adequate voltage to reliably run the converter. See the
section in Applications Information.
Table 1 summarizes these features.
OPERATIOU
Table 1. Safety and Protection Features
FEATURE
Maximum Current Fault
FUNCTION
Turn Off FETs at Maximum
Switch Current (V
SENSE
= 0.1)
Turn Off FETs and Reset V
C
for Short-Circuit (V
SENSE
= 0.2)
Turn Off Drivers If FB > V
REG
+ 0.22V
(Output Overvoltage)
Set Max Gate Voltage to Prevent
FET Gate Breakdown
Disable Gate Drives When V
IN
Is Too Low. Set Via GCL Pin
Turn Off Drivers If Chip
Temperature Is Too Hot
Prevents Opposite Driver from
Turning on Until Driver Is Off
(Cross Conduction in Transformer)
Disable Part When V
IN
2.55V
Limit Gate Drive Current
Limit Current from V5
Disable Part When SHDN <1.3V
EFFECT on GATE DRIVERS SLEW CONTROL EFFECT on V
C
, SS
Immediately Goes Low
Overridden
None
Short-Circuit Fault
Immediately Goes Low
Overridden
Discharge V
C
, SS
to GND
None
Overvoltage Fault
Immediately Goes Low
Overridden
GCL Clamp
Limits Max Voltage
None
None
Gate Drive
Undervoltage Lockout
Thermal Shutdown
Immediately Goes Low
Overridden
None
Immediately Goes Low
Overridden
None
Opposite Gate Lockout
Inhibits Turn On of
Opposite Driver
None
None
V
IN
Undervoltage Lockout
Gate Drive Source and Sink Current Limit
V5 Source/Sink Current Limit
Shutdown
Immediately Goes Low
Limit Drive Current
None
Overridden
None
None
None
None
None
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LT1683EG#PBF | 功能描述:IC REG CTRLR PWM CM 20-SSOP 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 |
| LT1683EG#TR | 功能描述:IC REG CTRLR PWM CM 20-SSOP RoHS:否 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 |
| LT1683EG#TRPBF | 功能描述:IC REG CTRLR PWM CM 20-SSOP 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 |
| LT1683IG | 功能描述:IC REG CTRLR PWM CM 20-SSOP RoHS:否 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 |
| LT1683IG#PBF | 功能描述:IC REG CTRLR PWM CM 20-SSOP 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 |
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