- 您现在的位置：买卖IC网 > Sheet目录1852 > MCP1791T-3302E/DC (Microchip Technology)IC REG LDO 3.3V 70MA SOT223-5
MCP1790/MCP1791
4.0
DEVICE OVERVIEW
4.4
External Protection
The MCP1790/MCP1791 are high input voltage
regulators capable of providing up to 70 mA of current
at output voltages up to 5.0V. The devices have an
input voltage operating range from 6.0V to 30V, 48V
absolute max. The MCP1790 devices are 3-pin devices
consisting of V IN , V OUT and GND. The MCP1791
devices have 5 or more pins which add Shutdown and
Power-Good functions to the MCP1790 device.
4.1 Startup
In the start phase, the device must see at least 6.0V to
initiate operation during power up. In the Power-down
mode, the V IN monitor will be turned off.
4.4.1 TRANSIENT VOLTAGE
PROTECTION (LOAD DUMP)
The regulator is capable of withstanding a 48V
(43.5V ±10) load dump transient for a duration of
500 ms and a repetition rate of 30 seconds
(ES-XW7T-1A278-AC, Ford Motor Company, Test
Pulse G Loaded).
While not necessary, good design practice dictates
adding an external transient suppressor, between VBB
and ground, with a low value resistor in series with the
battery supply and the V IN pin, to limit currents and volt-
ages due to electrical transients. Because of the regu-
lator startup current, the resistor value should be less
4.2
Thermal Shutdown
than (V BAT -6V) / 200 mA. For a 12V battery voltage,
the resistor value should be less than 30 ohms.
The regulator has a thermal shutdown. If the thermal
protection circuit detects an over temperature
condition, typically 157°C junction temperature, the
regulator will shut down. The device will recover from
the thermal shutdown when the junction temperature
drops to 137°C (typical).
4.4.2 REVERSE BATTERY PROTECTION
An external reverse battery blocking diode may be
used to provide polarity protection.
4.3
Regulator Output Voltage
The MCP1790/MCP1791 regulators are available in
fixed output voltage configurations. The standard
output voltages are 3.0V, 3.3V, and 5.0V.
VIN
T1
T2
Soft Start
-
Reference
T1
Voltage
en
Error Amplifier
+
T2
Temp
Sensor
Logical Block
en
Short Circuit
Protection
510k
VOUT
VIN
490k
Delay
SHDN
Monitoring VOUT
Delay
PWRGD
Monitoring VIN
GND
FIGURE 4-1:
DS22075B-page 14
MCP1790/MCP1791 Block Diagram.
? 2010 Microchip Technology Inc.
发布紧急采购，3分钟左右您将得到回复。
相关PDF资料
MCP1801T-1202I/OT
IC REG LDO 1.2V .15A SOT23-5
MCP1802T-1202I/OT
IC REG LDO 1.2V .26A SOT23-5
MCP1804T-A002I/DB
IC REG LDO 10V .15A SOT223-3
MCP1824ST-3002E/DB
IC REG LDO 3V .3A SOT223-3
MCP1825T-3302E/DC
IC REG LDO 3.3V .5A SOT223-5
MCP1826T-5002E/DC
IC REG LDO 5V 1A SOT223-5
MCP1827-3302E/ET
IC REG LDO 3.3V 1.5A DDPAK-5
MCP73113T-06SI/MF
IC LI-ION/LI-POLY CTRLR 10-DFN
相关代理商/技术参数
MCP1791T-3302E/DC
制造商:Microchip Technology Inc 功能描述:; Input Voltage Primary Max:30V; Output
MCP1791T-3302E/ET
功能描述:低压差稳压器 - LDO HI VLTG LDO 50 mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP1791T-5002E/DC
功能描述:低压差稳压器 - LDO HI VLTG LDO 50 mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP1791T-5002E/ET
功能描述:低压差稳压器 - LDO HI VLTG LDO 50 mA RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP-18
制造商:Taiyo Electric Ind. 功能描述:
MCP1801T-0902E/OT
制造商:Microchip Technology Inc 功能描述:HIGH PSRR 150 MA LDO, VIN 10V MAX, VOUT =0.9V SOT-23-5-TR - Tape and Reel
MCP1801T-0902I/OT
功能描述:低压差稳压器 - LDO Hi PSRR 150 mA LDO Vin 10V maxVout 0.9V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20
MCP1801T-1202I/OT
功能描述:低压差稳压器 - LDO Hi PSRR 150 mA LDO Vin 10V maxVout 1.2V RoHS:否 制造商:Texas Instruments 最大输入电压:36 V 输出电压:1.4 V to 20.5 V 回动电压（最大值）:307 mV 输出电流:1 A 负载调节:0.3 % 输出端数量: 输出类型:Fixed 最大工作温度:+ 125 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-20