MIC5370/1 Evaluation Board

MIC5370/1 Evaluation Board
High Performance Dual 150mA LDO
1.6mm x1.6mm Thin MLF®
General Description
The MIC5370/1 is an advanced dual LDO ideal for
powering general purpose portable devices. The
MIC5370/1 provides two independently controlled, high
performance 150mA LDOs in a tiny 1.6mm x 1.6mm Thin
MLF® package. When the MIC5371 is disabled an internal
resistive load is automatically applied to the output to
discharge the output capacitor.
Ideal for battery powered applications, the MIC5370/1
offers low dropout voltage 155mV@150mA and low
ground current typically 32μA per LDO.
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.
Getting Started
Requirements
The MIC5370/1 evaluation board requires an input power
supply that is able to deliver at least 350mA at a voltage
within the range of 2.5V 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 VIN terminal
may damage the device.
1. Connect an external supply to VIN. Apply the
desired input voltage to the VIN (J1) and ground
terminal (J2) of the evaluation board, paying
careful attention to polarity and supply voltage
(2.5V ≤ VIN ≤ 5.5V). An ammeter may be placed
between the input supply and the VIN terminal of
the evaluation board. Ensure that the supply
voltage is monitored at the VIN terminal. The
ammeter and power lead resistance can reduce
the voltage supplied to the input.
2. Enable/Disable the MIC5370/1. The evaluation
board is configured for “Default Disable” with
100KΩ pull down resistors on the enable pins to
GND. To enable the MIC5370/1 jumper the enable
terminal (J7 for LDO1 and J8 for LDO2) to VIN. To
disable the output, simply remove the jumper from
the EN terminal. The enable pin must be either
pulled high or low for proper operation. Removing
the pull down resistors and leaving the pins
floating will cause the regulators to operate in an
indeterminate state.
3. Connect the load to the VOUT terminals (J3 for
LDO1 and J5 for LDO2) and ground terminal
(J4). The load can be either a passive (resistor) or
active (electronic load). Be sure to monitor the
output voltage at the VOUT (J3, J5) terminals.
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
June 2009
M9999-061709-A
Micrel, Inc.
MIC5370/1 Evaluation Board
Ordering Information
Part Number
Description
MIC5370-SSYMT EV
High Performance Dual 150mA LDO VOUT1 =3.3V, VOUT2 = 3.3V Evaluation Board
MIC5370-PPYMT EV
High Performance Dual 150mA LDO VOUT1 =3.0V, VOUT2 = 3.0V Evaluation Board
MIC5370-MGYMT EV
High Performance Dual 150mA LDO VOUT1 =2.8V, VOUT2 = 1.8V Evaluation Board
MIC5370-M4YMT EV
High Performance Dual 150mA LDO VOUT1 =2.8V, VOUT2 = 1.2V Evaluation Board
MIC5370-G4YMT EV
High Performance Dual 150mA LDO VOUT1 =1.8V, VOUT2 = 1.2V Evaluation Board
MIC5370-4CYMT EV
High Performance Dual 150mA LDO VOUT1 =1.2V, VOUT2 = 1.0V Evaluation Board
MIC5371-SSYMT EV
High Performance Dual 150mA LDO with auto discharge VOUT1 =3.3V, VOUT2 = 3.3V Evaluation Board
MIC5371-PPYMT EV
High Performance Dual 150mA LDO with auto discharge VOUT1 =3.0V, VOUT2 = 3.0V Evaluation Board
MIC5371-MGYMT EV
High Performance Dual 150mA LDO with auto discharge VOUT1 =2.8V, VOUT2 = 1.8V Evaluation Board
MIC5371-M4YMT EV
High Performance Dual 150mA LDO with auto discharge VOUT1 =2.8V, VOUT2 = 1.2V Evaluation Board
MIC5371-G4YMT EV
High Performance Dual 150mA LDO with auto discharge VOUT1 =1.8V, VOUT2 = 1.2V Evaluation Board
MIC5371-4CYMT EV
High Performance Dual 150mA LDO with auto discharge VOUT1 =1.2V, VOUT2 = 1.0V Evaluation Board
June 2009
2
M9999-061709-A
Micrel, Inc.
MIC5370/1 Evaluation Board
Evaluation Board Schematic
U1
MIC5370/1-xxYMT
J1
VIN
1
VIN
VOUT1
VOUT2
J7
EN1
4
EN1
GND
C3
1µF/10V
R1
100k
2
EN2
J3
VOUT1
J5
VOUT2
J8
EN2
6
5
3
C1
1µF/10V
R1
100k
C2
1µF/10V
J2
GND
J4
GND
J6
GND
Bill of Materials
Item
Part Number
Manufacturer
Description
Qty.
C1
C1608X5R0J106K
TDK(2)
Capacitor, 10µF Ceramic, 6.3V, X5R, Size 0603
1
(1)
Capacitor, 1µF Ceramic, 10V, X5R, Size 0402
2
(3)
Resistor, 100KΩ,1/16W, Size 0402
C2, C3
R1, R2
GRM188R60J225KE19D
CRCW04021003KFKEA
MIC5370-XXYMT
Murata
Vishay
Micrel
(4)
U1
MIC5371-XXYMT
Micrel
(4)
Dual, 150mA LDO, 1.6mm x 1.6mm Thin MLF
2
®
Dual, 150mA LDO with auto discharge, 1.6mm x
1.6mm Thin MLF®
1
Notes:
1. Murata: www.murata.com
2. TDK: www.tdk.com
3. Vishay: www.vishay.com
4. Micrel, Inc.: www.micrel.com
June 2009
3
M9999-061709-A
Micrel, Inc.
MIC5370/1 Evaluation Board
PCB Layout Recommendations
Top Layer
Bottom Layer
June 2009
4
M9999-061709-A
Micrel, Inc.
MIC5370/1 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.
June 2009
5
M9999-061709-A