MIC5375/6 Evaluation Board

MIC5375/6 Evaluation Board
High Performance Low Dropout
150mA LDO
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.
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
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).
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
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
Micrel, Inc.
MIC5375/6 Evaluation Board
Evaluation Board Schematic
U1 MIC5375/6-xxYMT
4
VIN
VOUT 1
J1
VIN
C1
10µF
6.3V
2
GND
EN
J2
GND
J3
VOUT
3
R1
100k
C2
1µF
10V
J5
EN
J4
GND
Bill of Materials
Item
C2
Part Number
Manufacturer
GRM155R61A105KE15D
Murata
C1005X5R1A105KT
TDK
(2)
CV05X5R105K10AH
AVX/Kyocera
C1
C1608X5R0J106Z
TDK
R1
CRCW0603100KFKEA
Vishay
U1
MIC5375/6-xxYMT
Description
Qty.
Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
2
(1)
(3)
(2)
Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603
(4)
(5)
Micrel, Inc.
Resistor, 100kΩ, 1%, 1/16W, Size 0603
1
High Performance 150mA LDO, 4-Pin 1mm x 1mm
Thin MLF®
1
Notes:
1. Murata: www.murata.com
2. TDK: www.tdk.com
3. AVX/Kyocera: www.avx.com
4. Vishay: www.vishay.com
5. Micrel, Inc.: www.micrel.com
January 2009
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M9999-012109-A
Micrel, Inc.
MIC5375/6 Evaluation Board
J1
VIN
J5
EN
R3
100k
C1*
2.2µF
6.3V
U1 MIC5375/6YC5
1
VIN
VOUT 5
3
EN
GND
NC
4
C2*
2.2µF
6.3V
2
J2
GND
J3
VOUT
J4
GND
Bill of Materials
Item
C1, C2
C1, C2
Part Number
Manufacturer
Description
Qty.
Capacitor, 2.2µF, 6.3V, X5R, Size 0402
2
Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
2
(4)
Resistor, 619kΩ, 1%, 1/16W, Size 0402
1
(4)
Resistor, 267kΩ, 1%, 1/16W, Size 0402
1
Resistor, 100kΩ, 1%, 1/16W, Size 0402
1
High Performance 150mA LDO, 5-Pin SC-70
1
JMK105BJ225MV-F
Taiyo Yuden
GRM155R60G225ME15D
Murata
(1)
(2)
CV05X5R225K10AB
AVX/Kyocera
GRM155R61A105KE15D
Murata
C1005X5R1A105KT
TDK
(1)
(2)
CV05X5R105K10AH
AVX/Kyocera
R1
CRCW0402619KFKEA
Vishay
R2
CRCW04022673KFKEA
Vishay
R3
U1
CRCW04021003KFKEA
MIC5375/6YC5
(3)
(3)
(4)
Vishay
(5)
Micrel, Inc.
Notes:
1. Taiyo Yuden:
2. Murata: www.murata.com
3. AVX/Kyocera: www.avx.com
4. Vishay: www.vishay.com
5. Micrel, Inc.: www.micrel.com
* CIN = COUT = 1µF for Vout ≥ 2.5V, CIN = COUT = 2.2µF for VOUT < 2.5V
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M9999-012109-A
Micrel, Inc.
MIC5375/6 Evaluation Board
PCB Layout Recommendations (1mm x 1mm 4-Pin Thin MLF®) Fixed
Top Layer
Bottom Layer
January 2009
4
M9999-012109-A
Micrel, Inc.
MIC5375/6 Evaluation Board
PCB Layout Recommendations (SC-70-5)
Top Layer
Bottom Layer
January 2009
5
M9999-012109-A
Micrel, Inc.
MIC5375/6 Evaluation Board
MICREL, INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA
TEL +1 (408) 944-0800 FAX +1 (408) 474-1000 WEB http://www.micrel.com
The information furnished by Micrel in this data sheet is believed to be accurate and reliable. However, no responsibility is assumed by Micrel for its
use. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer.
Micrel Products are not designed or authorized for use as components in life support appliances, devices or systems where malfunction of a product
can reasonably be expected to result in personal injury. Life support devices or systems are devices or systems that (a) are intended for surgical implant
into the body or (b) support or sustain life, and whose failure to perform can be reasonably expected to result in a significant injury to the user. A
Purchaser’s use or sale of Micrel Products for use in life support appliances, devices or systems is a Purchaser’s own risk and Purchaser agrees to fully
indemnify Micrel for any damages resulting from such use or sale.
© 2008 Micrel, Incorporated.
January 2009
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M9999-012109-A