MIC2601YML Evaluation Board User Guide

MIC2601/2 Evaluation Board
1.2MHz/2MHz PWM DC/DC Boost
Switching Regulator
General Description
2. Connect the load to the VOUT (J4) and ground
(J5) terminals. The load can be either passive
(resistor) or active (electronic load). An ammeter
can be placed between the load and the VOUT
terminal. The default output voltage is set to 18V.
This can be adjusted by changing the feedback
resistors.
The MIC2601/2 is a 1.2MHz/2MHz, PWM DC/DC boost
switching regulator available in a 2mm x 2mm MLF®
package. High power density is achieved with the
MIC2601/2 internal 40V / 1.2A switch, allowing it to power
large loads in a tiny footprint.
The output current that could be drawn from MIC2601/2 is
tabulated below:
Inductor
Output
4.5VIN
8VIN
12VIN
20VIN
10µH
18V
150mA
400mA
600mA
–
10µH
38V
65mA
190mA
275mA
450mA
10µH
33V
75mA
200mA
325mA
550mA
Requirements
The MIC2601/2 evaluation board requires an input power
source that is able to deliver greater than 500mA at 4.5V.
Precautions
The evaluation board does not have reverse polarity
protection. Applying a negative voltage to the VIN (J1)
terminal may damage the device.
The MIC2601/2 evaluation board is tailored for a 4.5V to
20V input voltage range. The input voltage range should
not exceed 20V on the input.
Getting Started
1. Connect an external supply to the VIN. Apply
desired input voltage to the VIN (J1) and ground
(J2) terminals of the evaluation board, paying
careful attention to polarity and supply voltage
(4.5V≤VIN≤20V). An ammeter may be placed
between the input supply and the VIN terminal to
the evaluation board. Ensure that the supply
voltage is monitored at the VIN terminal. The
ammeter and/or power lead resistance can reduce
the voltage supplied to the input.
3. Enabling the MIC2601/2. The MIC2601/2 has a
enable pin connected to J3 terminal. A logic high
1.5V or greater will turn on the switching boost
regulator and a logic low 0.3V or lower will shut
down the switching boost regulator reducing the
quiescent current to less than 0.1µA.
Output Voltage
The output voltage on the MIC2601/2 evaluation board is
adjustable. The output voltage is controlled by the
feedback resistors (R1 and R2) and can be calculated as
follows:
⎛R
⎞
VOUT = 1.25V ⋅ ⎜⎜ 1 + 1⎟⎟
R
⎝ 2
⎠
The evaluation board is initially adjusted to 18V, but can
easily be modified by removing R1 and replacing it with the
value that yields the desired output voltage.
⎞
⎛V
R1 = R 2 × ⎜⎜ OUT − 1⎟⎟
⎠
⎝ 1.25
Ensure the output voltage selected does not exceed the
40V rating of the output switch.
Ordering Information
Part Number
Description
MIC2601/2YML EV
Evaluation board with the
MIC2601YML and MIC2602YML
devices
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 2008
M9999-092308-C
Micrel, Inc.
MIC2601/2 Evaluation Board
Evaluation Board Schematic
D1
B360A
L1
10µH
1
U1
J1
VIN 12V
1
2
2
C4
4.7µF/50V
MIC2601/2YML
VIN
SW
R1
6.65k
VDD
SS
PGND
2
C2
0.1µF/50V
FB
4
R3
10k
6
EN
R2
5
C3
0.1µF/50V
8
3
AGND
J3
EN
C5
4.7µF/50V
J4
+VO
18V/600mA
7
C1
2.2µF/16V
J2
GND
1
J5
GND
Bill of Materials
Item
C1
C2
C3
C4
C5
D1
L1
R1
R2
R3
U1
Part Number
GRM21BR71C225KA12L
0805YC225MAT
C2012 X7R1C225K
VJ0603Y104KXAAT
GRM188R71C104KA01D
VJ0603Y104KXAAT
GRM188R71C104KA01D
GRM31CR71H475KA12L
12065D475MAT
C3216X7R1H475K
GRM31CR71H475KA12L
12065D475MAT
C3216X7R1H475K
B360A
LQH55DN100M03
CRCW06036K65FKEA
CRCW06034990FKEA
CRCW06031002FRT1
MIC2601YML
MIC2602YML
Manufacturer
Murata(1)
AVX(2)
TDK(3)
Vishay(4)
Murata(1)
Vishay(4)
Murata(1)
Murata(1)
AVX(2)
TDK(3)
(1)
Murata
(2)
AVX
TDK(3)
Vishay(2)
Murata(1)
Vishay Dale(2)
Vishay Dale(2)
Vishay Dale(2)
Micrel(5)
Description
Qty
Capacitor, 2.2µF, 16V, X7R, Size 0805
1
Capacitor, 0.1µF, 50V, X7R, Size 0603
1
Capacitor, 0.1µF, 50V, X7R, Size 0603
1
Capacitor, 4.7µF, 50V, X7R, Size 1206
1
Capacitor, 4.7µF, 50V, X7R, Size 1206
1
3A, 60V, Schottky Diode
10µH, 1700mA (Isat)
Resistor, 6.65k, 1%, 1/16W, Size 0603
Resistor, 499Ωk, 1%, 1/16W, Size 0603
Resistor, 10k, 1%, 1/16W, Size 0603
1.2A, 1.2MHz Wide Range Integrated Switch Boost Regulator
1.2A, 2MHz Wide Range Integrated Switch Boost Regulator
1
2
1
1
1
1
Notes:
1.
Murata: www.murata.com
2.
AVX: www.avx.com
3.
TDK: www.tdk.com
4.
Vishay: www.vishay.com
5.
Micrel, Inc.: www.micrel.com
September 2008
2
M9999-092308-C
Micrel, Inc.
MIC2601/2 Evaluation Board
PCB Layout Recommendations
Top Layer
Bottom Layer
September 2008
3
M9999-092308-C
Micrel, Inc.
MIC2601/2 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.
September 2008
4
M9999-092308-C