Microchip MIC5375/6 Bedienungsanleitung
Microchip
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MIC5375/6
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MIC5375/6 Evaluation Board
High Performance Low Dropout
150mA LDO
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
January 2009 M9999-012109-A
General Description
The MIC5375/6 is a low quiescent current, low dropout
regulator designed for optimal performance in a small
space. When the MIC5376 is disabled an internal resistive
load is automatically applied to the output to discharge the
output capacitor. The MIC5375/6 is capable of sourcing
150mA of output current while only consuming 29µA of
operating current. This high performance LDO offers fast
transient response and good PSRR while consuming a
minimum of current.
Ideal for battery operated applications; the MIC5375/6
offers low dropout voltage 120mV typically @ 150mA. The
MIC5375/6 can also be put into a zero-off-mode current
state, drawing virtually no current when disabled.
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 MIC5375/6 evaluation board requires an input power
supply of 400mA with a voltage range of 2.3V to 5.5V to
the VIN.
Precautions
The evaluation board does not have reverse polarity
protection. Applying a negative voltage to the VIN terminal
may damage the device.
Getting Started
1. Connect an external supply to VIN. Apply desired
input voltage to the VIN (J1) and ground terminal
(J2) of the evaluation board, paying careful
attention to polarity and supply voltage. An
ammeter may be placed between the input supply
and the VIN terminal to the evaluation board.
Ammeter and/or power lead resistance can reduce
the voltage supplied to the input.
Ensure that the supply voltage is monitored at VIN
terminal. There is 10uF capacitor connected from
VIN (J1) to GND (J2).
2. Enable/Disable the MIC5375/6. The YMT (1x1
TMLF) evaluation board is provided with a 100kΩ
pull up resistor on enable pin (EN) to VIN, where as
the YC5 (SC-70) evaluation board is provided with
a 100kΩ pull down resistor from the enable pin
(EN) to GND. Simply jumper the enable pin (EN)
to VIN to enable the regulator output, or to GND to
disable the output. The enable pin must be either
pulled high or low. Removing the pull up resistor
and leaving the EN pin floating will cause the
regulator to operate in an indeterminate state.
3. Connect the loads to the VOUT terminal (J3) and
ground terminal (J2). The load can be either a
passive (resistor) or active (electronic load). Be
sure to monitor the output voltage at the VOUT (J3)
terminals. The evaluation board has a 1uF
capacitor connected from VOUT (J3) to GND (J2).
Ordering Information
Part Number Description
MIC5375-2.8YMT High Performance Low Dropout 150mA LDO,
1x1 TMLF,VOUT = 2.8V Evaluation Board
MIC5375-2.8YC5 High Performance Low Dropout 150mA LDO,
SC-70, VOUT = 2.8V Evaluation Board
MIC5376-2.8YMT High Performance Low Dropout 150mA LDO,
1x1 TMLF, VOUT = 2.8V Evaluation Board
MIC5376-2.8YC5 High Performance Low Dropout 150mA LDO,
SC-70,VOUT = 2.8V Evaluation Board
Produktspezifikationen
| Marke: | Microchip |
| Kategorie: | Nicht kategorisiert |
| Modell: | MIC5375/6 |
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