Microchip MIC5320/1 Handleiding

Microchip Niet gecategoriseerd MIC5320/1

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MIC5320/1 Evaluation Board
High Performance Dual 150mA
µCap ULDO™
ULDO is a trademark of Micrel, Inc.
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
March 2008 M9999-032708-A
General Description
The MIC5320 and MIC5321 are tiny dual output, ultra low
dropout linear regulators. The MIC5320 regulator provides
two independent enable pins, to disable each output
separately. The MIC5321 regulator provides a single
enable pin for both outputs as well as a bypass pin to
reduce the output voltage noise. The MIC5320/1 provides
two high performance 150mA LDOs in a tiny 6 pin 1.6mm
x 1.6mm Thin MLF
®
package.
The MIC5320/1 dual Ultra Low Dropout (ULDO™) linear
regulator is easy to use. A small output capacitance of only
1µF for each of the outputs is required. A bypass
capacitor of 0.01µF is included on the evaluation board for
the MIC5321 to reduce the output voltage noise and
improve the Power Supply Rejection Ratio (PSRR).
An input capacitor may be required when the power supply
is more than 4-inches away from the device. The
evaluation board includes an input capacitor of 10µF to
compensate for long inductive test leads.
Requirements
The MIC5320/1 evaluation board requires an input power
source that is able to deliver at least 300mA at a voltage
within the range of 2.3V 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.
The evaluation board is tailored for a Li-Ion range input
supply voltage. It should not exceed 5.5V on the input.
Getting Started
1. Connect an external supply to V
IN
. Apply the
desired input voltage to the V
IN
(J1) and ground
terminal (J2) of the evaluation board, paying
careful attention to polarity and supply voltage
(2.3V ≤ V
IN
≤ 5.5V). An ammeter may be placed
between the input supply and the V
IN
terminal to
the evaluation board to accurately monitor the
input current. The ammeter and/or power lead
resistance can reduce the voltage supplied to the
input so monitor the supply voltage at the V
IN
terminal.
2. Enable/Disable the MIC5320. The evaluation
board is set up for “Default Enable” on both
outputs with a 10k pull up resistor on each of the
enable pins (EN1 and EN2) to V
IN
. To disable an
output, simply jumper the EN terminal (J7 for
LDO1, J3 for LDO2) to the GND terminal (J2 or
J5). The enable pins must be either pulled high or
low for proper operation. Removing the pull up
resistors and leaving the pins floating will cause
the regulators to operate in an indeterminate state.
The MIC5321 has a single enable pin (J7) to
control both outputs of the regulator.
3. Connect the loads to the V
OUT
terminals (J4 for
LDO1, J6 for LDO2) and ground terminal (J5).
The load can be either a passive (resistor) or
active (electronic load). Be sure to monitor the
output voltage at the V
OUT
(J4 and J6) terminals.
Ordering Information
Part Number Description
MIC5320-XXYMT EV Evaluation board with the 150mA Dual
ULDO™ device
MIC5321-XXYMT EV Evaluation board with the 150mA Dual
ULDO™ device with bypass
Micrel, Inc. MIC5320/1 Evaluation Board
March 2008
2 M9999-032708-A
Evaluation Board Schematic
VIN
GND
VOUT1
U1
MIC5320/1-xxYMT
EN1
VOUT2
EN2/BYP
R2
10k
VIN
C1
10µF
C3
1µF
C4
1µF
J1
VIN
J3
EN2/BYP
J7
EN1
J2
GND
J4
VOUT1
J5
GND
J6
VOUT2
1
4
2
3
6
5
R1
10k
C2
0.01µF
Bill of Materials MIC5320-XXYMT
Item Part Number Manufacturer Description Qty
C1 C1608X5R0J106M TDK
(1)
Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603 1
C2 OPEN Do not populate
C3, C4 C1608X5R0J105M TDK
(1)
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 2
R1, R2 CRCW06031002FKEYE3 Vishay
(2)
Resistor, 10kΩ, 1%, 1/16W, Size 0603 2
U1 MIC5320-XXYMT Micrel
(3)
UCAP LDO, Dual 150mA, Size 1.6mm x 1.6mm Thin MLF
®
1
Bill of Materials MIC5321-XXYMT
Item Part Number Manufacturer Description Qty
C1 C1608X5R0J106M TDK
(1)
Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603 1
C2 VJ0603Y103KXQ Vishay
(2)
Capacitor, 0.01µF Ceramic, 10V, X7R, Size 0603 1
C3, C4 C1608X5R0J105M TDK
(1)
Capacitor, 1µF Ceramic, 6.3V, X5R, Size 0603 2
R1 OPEN Do not populate
R2 CRCW06031002FKEYE3 Vishay
(2)
Resistor, 10kΩ, 1%, 1/16W, Size 0603 1
U1 MIC5321-XXYMT Micrel
(3)
UCAP LDO, Dual 150mA, Size 1.6mm x 1.6mm Thin MLF
®
1
Notes:
1. TDK: www.tdk.com
2. Vishay: www.vishay.com
3. Micrel, Inc.: www.micrel.com
Micrel, Inc. MIC5320/1 Evaluation Board
March 2008
3 M9999-032708-A
PCB Layout Recommendations
Top Layer
Bottom Layer

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MIC5320/1

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