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MFG:FUJ
Part Number: MB3790
MFG: FUJ
Description: The MB3790 is designed to control power supplies to SRAM, logic IC, or other circuit devices and prote...
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MB3790
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DataSheet
General Description
MB3790 General Description
The MB3790 is designed to control power supplies to SRAM, logic IC, or other circuit devices and protects them against momentary power failures by using backup batteries. In addition to its function to supply the power to these devices, it has a function to switch the source of power to the primary or secondary backup battery when the power supply voltage drops below a predetermined level. Also, it outputs a reset signal when the power supply turns on or off or when a fault occurs in the power supply.
Ideally designed as a single-chip IC for power supply control, the MB3790 consumes only a minimal current and comes in a thin-type package. Therefore, it is best suited for power supply control in memory cards and similar other devices.
MB3790 Maximum Ratings
(Ta = +25°C)
* :When mounted on a 4 cm-square double-side epoxy board.
WARNING: Permanent device damage may occur if the above ABSOLUTE MAXIMUM RATINGS are exceeded.
Functional operation should be restricted to the conditions as detailed in the operational sections of
this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
|
Parameter |
Symbol |
Conditions |
Rating |
Unit | |
|
Input voltage |
VIN |
- |
0.3 to 6 |
v | |
|
Battery voltage |
VBAT |
0.3 to 6 |
V | ||
|
Reset output Voltage |
VRESET |
0.3 to VOUT + 0.3 ( 6) |
V | ||
|
Alarm output Voltage |
VALARM |
0.3 to VIN + 0.3 ( 6) |
V | ||
|
Output current |
IOUT |
250 |
mA | ||
|
Output high current |
IOH |
Source current |
6 |
mA | |
|
Output low current |
IOL |
Sink current |
6 |
mA | |
|
Power dissipation |
PD |
Ta +25°C |
SSOP |
450* |
mW |
|
SOP |
540* |
mW | |||
|
Storage temperature |
Tstg |
- |
55 to +125 |
°C | |
WARNING: Permanent device damage may occur if the above ABSOLUTE MAXIMUM RATINGS are exceeded.
Functional operation should be restricted to the conditions as detailed in the operational sections of
this data sheet. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
MB3790 Features
• Input circuit current consumption when non-loaded: 50 mA [typ]
• Output drive current: 200 mA [max]
• Resistance between input and output: 0.5 ohms [typ]
• Input power-down detection level: 4.2 V ± 2.5 %
• On-chip power-on reset circuit
• Primary battery voltage-down detection levels: 2.65 V, 2.37 V
• Output drive current: 200 mA [max]
• Resistance between input and output: 0.5 ohms [typ]
• Input power-down detection level: 4.2 V ± 2.5 %
• On-chip power-on reset circuit
• Primary battery voltage-down detection levels: 2.65 V, 2.37 V
MB3790 Connection Diagram
MB3790
PDF/DataSheet Download
- Datasheet: MB3790
- File Size: 197271 KB
- Manufacturer: FUJITSU [Fujitsu Media Devices Limited]
- Click here to Download
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