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MB3807A

Features: • Switching at low ON resistance For writing data: SWIN1 = 12 V, Ron = 0.3 For reading data: SWIN2 = 5 V, Ron = 6.0 SWIN2 = 3.3 V, Ron = 8.5 • Wide range of supply voltages: VCC = 2.7 to 5.5 V• Prevention of reverse current from the load at switch-off time• ON t...

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SeekIC No. : 004413286 Detail

MB3807A: Features: • Switching at low ON resistance For writing data: SWIN1 = 12 V, Ron = 0.3 For reading data: SWIN2 = 5 V, Ron = 6.0 SWIN2 = 3.3 V, Ron = 8.5 • Wide range of supply voltages: ...

MB3807A Data Sheet

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Part Number:
MB3807A
Supply Ability:
5000

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Product Details

Description



Features:

• Switching at low ON resistance
   For writing data:   SWIN1 = 12 V, Ron = 0.3
   For reading data:  SWIN2 = 5 V, Ron = 6.0
                                SWIN2 = 3.3 V, Ron = 8.5
• Wide range of supply voltages: VCC = 2.7 to 5.5 V
• Prevention of reverse current from the load at switch-off time
• ON time controllable with external pin
• Break-before-make operation


Pinout

Connection Diagram


Specifications

Parameter Symbol Condition Rating Unit
Min. Max.
Input voltage VIN - 0.3 7 V
Switching voltage VSWIN1 - 0.3 18 V
VSWIN2 - 0.3 18 V
Switching current ISWIN1 Switch-on peak - 1.5 A
ISWIN2 - 0.3 A
Permissible loss PD Ta +75°C - 290 mW
Storage temperature Tstg - 55 +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.


Description

When data is written to or read from flash memory, MB3807A requires that the voltage at its power supply (VPP) be switched (to 12 V for writing and to 3.3 or 5.0 V for reading).

The MB3807A is a power management switching IC, designed to be compatible with the PCMCIA digital controller, to switch the VPP voltage of flash memory.

When the switch is turned on, optimum voltage is applied to the gate of the internal charge pump N-ch MOS switch, providing a constant amount of ON resistance. The MB3807A is also kept to be low to reduce voltage drop at the VPP pin that is caused by large current flowing when data is written.

In addition, the OFF time is much shorter than the ON time to prevent short-circuiting between the reading and writing power supplies when the MB3807A switches the VPP voltage for reading or writing data (break-before-make operation).




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