Microchip MIC5370/1 Manual


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Side 1/5
MIC5370/1 Evaluation Board
High Performance Dual 150mA LDO
1.6mm x1.6mm Thin MLF®
MLF and MicroLeadFrame are registered trademarks of Amkor Technology, Inc.
Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
June 2009 M9999-061709-A
General Description
The MIC5370/1 is an advanced dual LDO ideal for
powering general purpose portable devices. The
MIC5370/1 provides two independently controlled, high
performance 150mA LDOs in a tiny 1.6mm x 1.6mm Thin
MLF® package. When the MIC5371 is disabled an internal
resistive load is automatically applied to the output to
discharge the output capacitor.
Ideal for battery powered applications, the MIC5370/1
offers low dropout voltage 155mV@150mA and low
ground current typically 32μA per LDO.
An input capacitor may be required when the power supply
is more than 4-inches from the device. The evaluation
board includes an input capacitor of 10μF to compensate
for long inductive test leads.
Requirements
The MIC5370/1 evaluation board requires an input power
supply that is able to deliver at least 350mA at a voltage
within the range of 2.5V to 5.5V. The output load can be
either active or passive.
Precautions
The evaluation board does not have reverse polarity
protection. Applying a negative voltage to the V IN terminal
may damage the device.
Getting Started
1. Connect an external supply to VIN. Apply the
desired input voltage to the VIN (J1) and ground
terminal (J2) of the evaluation board, paying
careful attention to polarity and supply voltage
(2.5V VIN 5.5V). An ammeter may be placed
between the input supply and the V IN terminal of
the evaluation board. Ensure that the supply
voltage is monitored at the VIN terminal. The
ammeter and power lead resistance can reduce
the voltage supplied to the input.
2. Enable/Disable the MIC5370/1. The evaluation
board is configured for “Default Disable with
100K pull down resistors on the enable pins to
GND. To enable the MIC5370/1 jumper the enable
terminal (J7 for LDO1 and J8 for LDO2) to VIN. To
disable the output, simply remove the jumper from
the EN terminal. The enable pin must be either
pulled high or low for proper operation. Removing
the pull down resistors and leaving the pins
floating will cause the regulators to operate in an
indeterminate state.
3. Connect the load to the VOUT terminals (J3 for
LDO1 and J5 for LDO2) and ground terminal
(J4). The load can be either a passive (resistor) or
active (electronic load). Be sure to monitor the
output voltage at the VOUT (J3, J5) terminals.


Produkt Specifikationer

Mærke: Microchip
Kategori: Ikke kategoriseret
Model: MIC5370/1

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