Microchip MIC5322 Handleiding

Microchip Niet gecategoriseerd MIC5322

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MIC5322 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 MIC5322 is a tiny dual output, ultra low dropout linear
regulator. The MIC5322 regulator provides a single active
low enable pin for both outputs as well as a bypass pin to
reduce the output voltage noise. The MIC5322 provides
two high performance 150mA LDOs in a tiny 6 pin 1.6mm
x 1.6mm Thin MLF
®
package.
The MIC5322 dual Ultra Low Dropout (ULDO™) linear
regulator is easy to use. A small capacitance of only 1µF is
required for the input voltage and each of the outputs to
maintain stability. A bypass capacitor of 0.01µF is included
on the evaluation board to reduce the output voltage noise
and improve the Power Supply Rejection Ratio (PSRR).
The evaluation board includes an input capacitor of 10µF
to compensate for long inductive test leads.
Requirements
The MIC5322 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 MIC5322. The evaluation
board is set up for “Default Disable” on both
outputs with a 10k pull up resistor on the enable
pin (/EN) to V
IN
. To enable both outputs, simply
jumper the /EN terminal (J7) to the GND terminal
(J2 or J5). The enable pin must be either pulled
high or low for proper operation. Removing the pull
up resistors and leaving the pin floating will cause
the regulators to operate in an indeterminate state.
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
MIC5322-XXYMT EV
Evaluation board with the 150mA
Dual ULDO™ device with bypass
and active low enable
Micrel, Inc. MIC5322 Evaluation Board
March 2008
2 M9999-032708-A
Evaluation Board Schematic
VIN
GND
VOUT1
U1
MIC5322-xxYMT
EN
VOUT2
BYP
R2
10k
VIN
C1
10µF
C3
1µF
C4
1µF
J1
VIN
J3
BYP
J7
/EN1
J2
GND
J4
VOUT1
J5
GND
J6
VOUT2
1
4
2
3
6
5
C2
0.01µF
Bill of Materials
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 MIC5322-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. MIC5322 Evaluation Board
March 2008
3
M9999-032708-A
PCB Layout Recommendations
Top Layer
Bottom Layer

Product specificaties

Merk: Microchip
Categorie: Niet gecategoriseerd
Model: MIC5322

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