MIC2204-10BMM Micrel Inc, MIC2204-10BMM Datasheet

IC REG SYNC BUCK 2MHZ 10-MSOP

MIC2204-10BMM

Manufacturer Part Number
MIC2204-10BMM
Description
IC REG SYNC BUCK 2MHZ 10-MSOP
Manufacturer
Micrel Inc
Type
Step-Down (Buck)r
Datasheet

Specifications of MIC2204-10BMM

Internal Switch(s)
Yes
Synchronous Rectifier
Yes
Number Of Outputs
1
Voltage - Output
Adj to 1V
Current - Output
600mA
Frequency - Switching
2MHz
Voltage - Input
2.3 ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Mounting Type
Surface Mount
Package / Case
10-MSOP, Micro10™, 10-uMAX, 10-uSOP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Power - Output
-
General Description
The Micrel MIC2204 is a high-efficiency, 2MHz PWM syn-
chronous buck switching regulator. Power conversion effi-
ciency of above 95% is easily obtainable over a wide range
of applications. A proprietary internal compensation tech-
nique ensures stability with the smallest possible inductor
and ceramic output capacitor.
The MIC2204 operates from 2.3V to 5.5V input and features
internal power MOSFETs that can supply over 600mA of
output current with output voltages down to 1V. The MIC2204
implements a constant 2MHz pulse-width-modulation (PWM)
control scheme which reduces spurious noise in sensitive RF
and communication applications. Additionally, the MIC2204
can be synchronized to an external clock, or multiple MIC2204s
can easily be daisy-chained with the SYNCLOCK feature.
The MIC2204 has a high bandwidth loop (typ. 200kHz) which
allows ultra-fast transient response times. This is very useful
when powering applications that require fast dynamic re-
sponses, such as the CPU cores and RF circuitry in high-
performance cellular phones and PDAs.
The MIC2204 is available in 10-pin MSOP and 3mm × 3mm
MLF™-10L package options with an operating junction tem-
perature range from –40°C to 125°C .
MLF and MicroLeadFrame are trademarks of Amkor Technology, Inc.
April 2005
Typical Application
MIC2204
2.3V to 6V
Adjustable Output Synchronous Buck Converter
Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com
SYNC_OUT
SYNC_IN
EN
1
2
3
4
5
MIC2204BMM
4.7µH
10
9
8
7
6
10nF
4.7µF
3.3V
500mA
1
Features
• Input voltage range: 2.3V to 5.5V
• Output down to 1V/ 600mA
• 2MHz PWM operation
• Ultra-fast transient response (typical 200kHz GBW)
• Internal compensation
• All ceramic capacitors
• >95% efficiency
• Fully integrated MOSFET switches
• Easily synchronized to external clock
• SYNCLOCK feature to daisy-chain multiple 2204s
• <340µA quiescent current
• Logic controlled micropower shutdown
• Thermal shutdown and current limit protection
• 10-pin MSOP and 3mm×3mm MLF™-10L
• –40°C to +125°C junction temperature range
Applications
• High-efficiency portable power
• Cellular phones
• PDAs
• 802.11 WLAN power supplies
• RF power supplies
• Li Ion battery powered applications
High-Efficiency 2MHz Synchronous Buck Converter
100
95
90
85
80
75
70
65
60
55
50
0
5V
MIC2204
4.2V
OUTPUT CURRENT (mA)
vs. Output Current
100
IN
IN
Efficiency
200
300
3.3V
3.6V
400
OUT
IN
500
M9999-042205
Micrel, Inc.

Related parts for MIC2204-10BMM

MIC2204-10BMM Summary of contents

Page 1

... CPU cores and RF circuitry in high- performance cellular phones and PDAs. The MIC2204 is available in 10-pin MSOP and 3mm × 3mm MLF™-10L package options with an operating junction tem- perature range from –40°C to 125°C . ...

Page 2

... Switch (Output): Internal power MOSFET output switches. Supply Voltage (Input): Requires bypass capacitor to GND. SYNC_IN for the MIC2204: Sync the main switching frequency to an external clock. Tie pin to ground if not using this function. Tying SYNC_IN high reduces the switching frequency to 1.6MHz (See “Applications Informa- tion” ...

Page 3

... MIC2204 Absolute Maximum Ratings Supply Voltage (V ) ....................................................... 6V IN Output Switch Voltage (V ) .......................................... 6V SW Logic Input Voltage ( SYNC_IN (2) Power Dissipation Storage Temperature (T ) ....................... –65°C to +150°C S Electrical Characteristics T = 25°C with 3.5V, unless otherwise noted. Bold values indicate –40°C < Parameter Condition Supply Voltage Range ...

Page 4

... MIC2204 Typical Characteristics Efficiency vs. Output Current 100 3. 1.8V 55 OUT 50 OUTPUT CURRENT (mA) Output Voltage vs. Output Current 1.01 1.0075 1.005 1.0025 1 0.9975 0.995 0.9925 0.99 0 0.1 0.2 0.3 0.4 0.5 OUTPUT CURRENT (A) Bias Supply vs. Temperature 2.32 2.318 2.316 2.314 2.312 2.31 2.308 2.306 2 ...

Page 5

... MIC2204 Functional Characteristics Enable Transient TIME (40µs/div.) Line Transient TIME (200µs/div.) April 2005 OUT L = 4.7µ 10µ OUT L = 4.7µ 10µ 500mA OUT Switch Node Output Ripple 500mA IN OUT 4.7µ 10µF X5R OUT TIME (400ns/div.) 5 Disable Transient ...

Page 6

... MIC2204 Block Diagram SYNC_OUT Oscillator SYNC_IN Ramp Generator BIAS Internal Supply 1. M9999-042205 C IN PWM Comparator Error Amplifier Driver MIC2204 Block Diagram 6 Micrel, Inc VIN SW C OUT MIC2204 PGND April 2005 V OUT ...

Page 7

... BIAS The bias supply is an internal 2.3V linear regulator that supplies the internal biasing voltage to the MIC2204. A 10nF ceramic capacitor is required on this pin for bypassing. Do not use the BIAS pin as a supply. The BIAS pin was designed to supply internal power and not external circuitry ...

Page 8

... This reduces their ability to filter out high frequency noise. Output Capacitor The MIC2204 was designed specifically for the use of a 4.7µF ceramic output capacitor. The output capacitor requires either an X7R or X5R dielectric. Y5V and Z5U dielectric ...

Page 9

... With a typical gain bandwidth of 200kHz, the MIC2204 is capable of extremely fast transient responses. The MIC2204 is designed to be stable with a 4.7µH inductor and a 4.7µF ceramic (X5R) output capacitor for output voltages greater than 1.6V. For output voltages less than 1.6V, a 10µ ...

Page 10

... DC output voltage is achieved. As load or supply voltage changes, so does the duty cycle to maintain a constant output voltage. In cases where the input supply runs into a dropout condition, the MIC2204 will run at 100% duty cycle. The MIC2204 provides constant switching at 2MHz with synchronous internal MOSFETs. The internal MOSFETs ...

Page 11

... MIC2204 Package Information 3.15 (0.122) 2.85 (0.114) 0.30 (0.012) 0.15 (0.006) 0.50 BSC (0.020) DIMENSIONS: mm 3.00 BSC. 0.48 typ 0.20 dia 0.50 BSC. ODD TERMINAL SIDE MICREL INC. 2180 FORTUNE DRIVE SAN JOSE, CA 95131 USA + 1 (408) 944-0800 TEL This 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. ...

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