MIC2199 Evaluation Board
Micrel
MIC2199 Evaluation Board
300kHz SO-8 Synchronous Buck Control IC
Introduction
Micrel’s MIC2199 is a high power 300kHz synchronous buck
DC-DC controller housed in a small 4mm x 4mm MLF™
12-lead package. The MIC2199 operates from a wide 4.5V to
32V input and can be programmed for output voltages from
0.8V to 6V. The wide input voltage capability makes the
MIC2199 an ideal solution for point-of-load DC-to-DC con-
version in 5V, 12V and higher systems.
The 300kHz switching frequency allows the use of small
inductor and small output capacitors. The current mode PWM
control along with external COMP pin allows for ease of
stability compensation and fast transient response across a
wide range of applications.
An all N-Channel synchronous architecture and powerful
output drivers allow up to 20A of output current capability. For
smaller external components, refer to the 500kHz MIC2198.
MIC2199 Evaluation Board Input/Output Voltages and
Load Current
The MIC2199 evaluation board is designed to operate from
V
IN
= 5V to 12V at an output voltage of 1.5V, 2.5V, or 3.3V at
a load current of up to 5A. This evaluation board can easily be
modified to handle up to 32V
IN
by changing the input capaci-
tor voltage rating; and handle higher load current by parallel-
ing MOSFETs in the Q3 and Q4 slots and lowering the sense
resistor value to handle higher load current. Consult the
MIC2199 data sheet for more information.
Micrel, Inc.
MIC2198/99-BML
Quick-Start Guide
Refer to Figure 1 for the following:
1. Connect the positive terminal from the power
supply to V
IN
post (J1) on the MIC2199 evalua-
tion board.
2. Connect the GND terminal of the input power
supply to GND (J2).
3. Connect a digital voltmeter across V
OUT
(J3)
and GND (J4) to measure output voltage.
4. Program the output voltage by selecting jumper
JP1 to be in 3.3V, 2.5V, or 1.5V position.
5. After turning the input supply on, the output
voltage should read the programmed output
voltage.
V
IN
J1
JP2
V
IN
DVM
GND
J2
GND
J4
V
OUT
J3
Figure 1. MIC2199 Evaluation Board Hookup
MLF and
Micro
LeadFrame are trademarks of Amkor Technology, Inc.
Micrel, Inc. • 1849 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 944-0970 • http://www.micrel.com
June 2003
1
MIC2199 Evaluation Board
MIC2199 Evaluation Board
Evaluation Board Efficiency
Figures 2 and 3 show the MIC2199 efficiency for input
voltages of 5V and 12V.
Micrel
Transient Response
Figures 4 and 5 show the transient response and output
voltage ripple for the MIC2199 evaluation board.
Output Transient Response
100
95
EFFICIENCY (%)
MIC2199 Efficiency
for V
IN
= 5V
3.3V
85
80
75
1.5V
V
IN
= 5.0V
V
OUT
= 1.5V, 2.5V, 3.3V
0
1
2
3
I
LOAD
(A)
4
5
50mV/div
90
2.5V
V
IN
= 5V
V
OUT
= 3.3V
I
LOAD
= 0.5A to 4A
TIME (200µs/div)
Figure 2. MIC2199 Efficiency for
V
IN
= 5V and V
OUT
= 1.5V, 2.5V, 3.3V
95
MIC2199 Efficiency
for V
IN
= 12V
V
IN
= 12V
V
OUT
= 1.5V, 2.5V, 3.3V
Figure 4. MIC2199 Output Transient Response for
V
IN
= 5V, V
OUT
= 3.3V, I
LOAD
= 0.5A to 4A
Output Voltage Ripple
EFFICIENCY (%)
90
85
2.5V
3.3V
V
IN
= 5V
V
OUT
= 3.3V
I
LOAD
= 5A
80
75
0
1
2
3
I
LOAD
(A)
4
5
Figure 3. MIC2199 Efficiency for
V
IN
= 12V and V
OUT
= 1.5V, 2.5V, 3.3V
TIME (1µs/div)
Figure 5. MIC2199 Output Voltage Ripple for
V
IN
= 5V, V
OUT
= 3.3V, I
LOAD
= 5A
June 2003
3
50mV/div
1.5V
MIC2199 Evaluation Board
MIC2199 Evaluation Board
Micrel
Bill of Materials
Item
C1, C2
C3, C4
C5, C15
C6, C9
C7
C8
C10
C11, C13
C12, C14
D1
D1
D2
J1-J4
JP1
JP2
JUMPER
L1
Q1, Q2
Q3, Q4
R1
R2
R3
R4
R5
R6
R7
R8, R10
R9
U1
CRCW06031002FRT1
CRCW06031152FRT1
CRCW06034751FRT1
CRCW06033161FRT1
CRCW06038061FRT1
CRCW060310R0FRT1
WSL2512-R01-F
MIC2199-BML
CRCW06031003FRT1
Vishay
Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Vishay Dale
(2)
Micrel Semiconductor
(8)
CMDSH2-3
SD103AWS
1N5819HW
2551-2-00-01-00-00-07-0
S1010-02-ND
S1012-04-ND
SNT-100-BL-G
CEP125-5R6MC-H
IRF7821TR
SI4888DY
Central Semiconductor
(4)
Vishay/GS
(2)
Diodes, Inc.
(5)
MilMax
Sullins
Sullins
Samtec
Sumida
(6)
International Rectifirer
(7)
Vishay Siliconix
(2)
GRM188R61A475KE19D
VJ0805S225KXAAT
TPSJ107K010R0050
594D107KX06R3D2T
GRM216R61E105KA12D
VJ0603S105KXAAT
VJ0603Y104KXXAT
VJ0603Y222KXAAT
Murata
(3)
Vitramon
(2)
Vitramon
(2)
Vitramon
(2)
Vitramon
(2)
muRata
(3)
Vitramon
(2)
AVX
(1)
Vishay
(2)
Part Number
TPSD686M020R0200
594D686X0020C2T
Manufacturer
AVX
(1)
Vishay
(2)
Description
68µF/20V
OPEN
1µF/25V, size 0805
0.1µF, size 0603, X7R, 25V
560pF, size 0603, X7R, 50V
OPEN, size 0603
4.7µF, size 0603, 10V
100µF, 6.3V
OPEN
0.5A, 30V Schottky
1A, 40V Schottky
Turret Pins
1x2 header
3x2 header
shorting jumper
Sumida 5.6µH
N-Channel MOSFET
OPEN
100kΩ, size 0603, 1%
OPEN, size 0603
10kΩ, size 0603, 1%
11.5kΩ, size 0603, 1%
4.75kΩ, size 0603,1%
3.16kΩ, size 0603, 1%
8.06kΩ 1%, size 0603
10Ω, 1%, size 0603
0.01Ω, size 2512, 1%
500kHz Sync-Buck Converter
Qty.
2
OR
0
1
OR
2
1
0
1
OR
2
OR
0
1
OR
1
4
1
1
1
1
2
OR
0
1
0
1
1
1
1
1
2
1
1
Vendor Phone Numbers:
1.
AVX tel: 843-448-9411
2.
Vishay tel: 206-452-5664
3.
Murata tel: 800-831-9172
4.
Central Semiconductor tel: 631-435-1110
5.
Diodes, Inc. tel: 805-446-4800
6.
Sumida tel: 408-321-9660
7.
International Rectifier tel: 310-322-3331
8. Micrel Semiconductor
tel: 408-944-0800
Shaded items not being used by evaluation board.
MIC2199 Evaluation Board
4
June 2003
MIC2199 Evaluation Board
Micrel
Printed Circuit Board Layouts
Figure 6a. Top Silkscreen
Figure 6c. Bottom Silkscreen
Figure 6b. Top Layer
Figure 6d. Bottom Layer
Figure 6e. Midlayer1
MICREL, INC.
TEL
1849 FORTUNE DRIVE SAN JOSE, CA 95131
FAX
USA
+ 1 (408) 944-0800
+ 1 (408) 944-0970
WEB
http://www.micrel.com
The information furnished by Micrel in this datasheet 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 at Purchaser’s own risk and Purchaser agrees to fully indemnify
Micrel for any damages resulting from such use or sale.
© 2003 Micrel, Incorporated.
June 2003
5
MIC2199 Evaluation Board
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