Microchip MIC5373/83 Bruksanvisning
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MIC5373/83
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MIC5373/83 Evaluation Board
Triple 200mA µCap
LDO in 2.5 x 2.5 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
September 2010 M9999-092410-A
General Description
The MIC5373/83 is an advanced, general purpose, triple-
output linear regulator offering high Power Supply
Rejection (PSRR) in a tiny 16-pin, 2.5mm x 2.5mm Thin
MLF®
package. The MIC5373/83 is capable of 200mA
from each output and offers high PSRR, making it an ideal
solution for any portable electronic application. The
MIC5373 provides independent control active high enables
for each of the LDO outputs. The MIC5383 provides active
low enables.
The MIC5373/83 incorporates a Power-On-Reset (POR)
supervisor with adjustable delay time set by an external
capacitor, and an independent input pin to monitor any
voltage level. Once high, the POR output can be asserted
low again by enabling the Manual Reset (MR) pin. When
the MR pin is restored low, the POR output will re-time the
delay set by the external delay capacitor.
An input capacitor is required when the power supply is
more than four inches from the device. The evaluation
board includes an input capacitor of 10µF to compensate
for long inductive test leads.
Data sheets and support documentation can be found on
Micrel’s web site at: www.micrel.com.
Requirements
The MIC5373/83 evaluation board requires two power
supplies. The first supply must be able to provide a
minimum of 800mA with a voltage range of 1.7V − 5.5V to
the INLDO pins. The second supply for V BIAS must be able
to supply a few mA with a voltage range of 2.5V − 5.5V.
For input voltages of 2.5V or greater, a single supply can
be used for both the INLDO and VBIAS. The output load can
be either active or passive.
Precautions
The MIC5373/83 evaluation board does not have reverse
polarity protection. Applying a negative voltage to the
INLDO or VBIAS terminals may damage the device.
Getting Started
• Connect an External Supply to V BIAS. Apply the
desired input voltage to the VBIAS (J1) and ground (J2)
terminal of the evaluation board, paying careful attention
to polarity and supply voltage (2.5V ≤ VBIAS ≤ 5.5V).
• Connect an External Supply to INLDO. Apply the
desired input voltage to the INLDO (J4 for LDO1/2, J5
for LDO3) and ground (J2, J6, and J13) terminals of the
evaluation board, paying careful attention to polarity and
supply voltage (1.7V ≤ INLDO ≤ 5.5V). An ammeter can
be placed between the input supply and the INLDO
terminal of the evaluation board. Ensure that the supply
voltage is monitored at the INLDO terminals. The
ammeter and/or power-lead resistance can reduce the
voltage supplied to the input.
• Enable/Disable the MIC5373/83. The MIC5373
evaluation board is supplied with 100KΩ pull-up
resistors (R1, R2, R3) on the EN1, EN2, and EN3 pins
for default on state. While the MIC5383 has pull-down
resistors (R1b, R2b, R3b) for default on state. To
disable the MIC5373 jumper the enable terminal (J15 for
LDO1, J16 for LDO2, and J17 for LDO3) to GND. To
disable the MIC5383 jumper the enable terminal (J15 for
LDO1, J16 for LDO2, and J17 for LDO3) to V BIAS. The
enable pins must be either pulled high or low. Leaving
enable pins floating will cause the regulator to operate in
an indeterminate state.
• Connect the Load. Connect the loads to the V OUT
Terminals (J7 for LDO1, J8 for LDO2 and J9 for LDO3)
and Ground Terminals (J2, J6, J11, or J13). The loads
can be either passive (resistor) or active (electronic
load). Be sure to monitor the output voltage at the V OUT
(J7, J8 and J9) terminals.
Ordering Information
Part Number Description
MIC5373-MG4YMT EV
Triple-Output LDO Evaluation
Board. VOUT1 = 2.8V, VOUT2 = 1.8V,
VOUT3 = 1.2V. Active High Enables.
MIC5383-MG4YMT EV
Triple-Output LDO Evaluation
Board. VOUT1 = 2.8V, VOUT2 = 1.8V,
VOUT3 = 1.2V. Active Low Enables.
Produktspecifikationer
| Varumärke: | Microchip |
| Kategori: | Inte kategoriserad |
| Modell: | MIC5373/83 |
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