MCP1790-3302E/EB Microchip Technology, MCP1790-3302E/EB Datasheet - Page 14

• Manufacturer Part Number: MCP1790-3302E/EB
• Description: IC LDO REG 70MA 3.3V 3DDPAK
• Manufacturer: Microchip Technology

Specifications of MCP1790-3302E/EB

• Package / Case: TO-263-3, D²Pak (3 leads + Tab), TO-263AA
• Regulator Topology: Positive Fixed
• Voltage - Output: 3.3V
• Voltage - Input: 6 ~ 30 V
• Voltage - Dropout (typical): 0.7V @ 70mA
• Number Of Regulators: 1
• Current - Output: 70mA (Min)
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Number Of Outputs: 1
• Polarity: Positive
• Input Voltage Max: 30 V
• Output Voltage: 3.3 V
• Output Type: Fixed
• Dropout Voltage (max): 1.3 V at 70 mA
• Output Current: 70 mA
• Line Regulation: +/- 0.0002 % / V
• Load Regulation: +/- 0.2 %
• Voltage Regulation Accuracy: 2.5 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Limit (min): -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

MCP1790/MCP1791
4.0
The MCP1790/MCP1791 are high input voltage regula-
tors 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 consist-
ing of V
have 5 or more pins which add Shutdown and
Power-Good functions to the MCP1790 device.
4.1
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
4.2
The regulator has a thermal shutdown. If the thermal
protection
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).
4.3
The MCP1790/MCP1791 regulators are available in
fixed output voltage configurations. The standard
output voltages are 3.0V, 3.3V, and 5.0V.
FIGURE 4-1:
DS22075A-page 14
IN
DEVICE OVERVIEW
Startup
Thermal Shutdown
Regulator Output Voltage
SHDN
, V
IN
circuit
OUT
monitor will be turned off.
, and GND. The MCP1791 devices
detects
T1
Delay
MCP1790/MCP1791 Block Diagram.
T2
Logical Block
Monitoring VIN
an
Reference
Voltage
over
temperature
VIN
en
Soft Start
Monitoring VOUT
en
Error Amplifier
+
4.4
4.4.1
The regulator is capable of withstanding a 48V
(43.5V ±10) load dump transient for a duration of
180 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 VIN pin, to limit currents and
voltages due to electrical transients. Because of the
regulator startup current, the resistor value should be
less than (V
age, the resistor value should be less than 30 ohms.
4.4.2
An external reverse battery blocking diode may be
used to provide polarity protection.
-
Short Circuit
Protection
External Protection
TRANSIENT VOLTAGE
PROTECTION (LOAD DUMP)
REVERSE BATTERY PROTECTION
BAT
-6V) / 200 mA. For a 12V battery volt-
VIN
GND
Delay
© 2008 Microchip Technology Inc.
Sensor
510k
490k
Temp
T2
T1
VOUT
PWRGD