MIC2204BMM Micrel Inc, MIC2204BMM Datasheet

IC CONV SYNC BUCK PWM HE 10MSOP

MIC2204BMM

Manufacturer Part Number
MIC2204BMM
Description
IC CONV SYNC BUCK PWM HE 10MSOP
Manufacturer
Micrel Inc
Type
Step-Down (Buck)r
Datasheet

Specifications of MIC2204BMM

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
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MIC2204BMM
Manufacturer:
MICREL
Quantity:
3 860
Part Number:
MIC2204BMM TR
Manufacturer:
MICREL
Quantity:
2 128
Part Number:
MIC2204BMM TR
Manufacturer:
MICREL
Quantity:
10 296
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.

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MIC2204BMM 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 . Typical Application 4.7µH MIC2204BMM 1 2. SYNC_IN 3 SYNC_OUT ...

Page 2

... MIC2204 Ordering Information Part Number MIC2204BMM MIC2204YMM MIC2204BML MIC2204YML Pin Configuration SW 1 VIN 2 SYNC_IN 3 SYNC_OUT MSOP-10 (MM) Pin Description Pin Number Pin Name VIN 3 SYNC_IN 4 SYNC_OUT BIAS GND M9999-042205 Voltage Junction Temp. Range Adjustable –40°C to +125°C Adjustable –40°C to +125°C Adjustable – ...

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 ...

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 ...

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 ...

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

MIC2204 Functional Description VIN VIN provides power to the output and to the internal bias supply. The supply voltage range is from 2.3V to 5.5V. A minimum 1µF ceramic is recommended for bypassing the input supply. Enable The enable pin ...

Page 8

MIC2204 Applications Information Input Capacitor A minimum 1µF ceramic is recommended on the VIN pin for bypassing. X5R or X7R dielectrics are recommended for the input capacitor. Y5V dielectrics are not recommended: they lose most of their capacitance over temperature ...

Page 9

MIC2204 Figure 2 shows an efficiency curve. On the non-shaded portion, from 0 to 200mA, efficiency losses are dominated by quiescent current losses, gate drive and transition losses. In this case, lower supply voltages yield greater efficiency in that they ...

Page 10

MIC2204 PWM Operation The MIC2204 is a pulsewidth modulation (PWM) controller. By controlling the ratio of on-to-off time, or duty cycle, a regulated DC output voltage is achieved. As load or supply voltage changes, so does the duty cycle to ...

Page 11

... 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. Micrel reserves the right to change circuitry and specifications at any time without notification to the customer. ...

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