MIC2183YQS Micrel Inc, MIC2183YQS Datasheet

QSOP-16 Low Vin Synchronous Buck PWM Control IC

MIC2183YQS

Manufacturer Part Number

MIC2183YQS

Description

QSOP-16 Low Vin Synchronous Buck PWM Control IC

Manufacturer

Micrel Inc

Datasheet

1.MIC2183YQS.pdf (12 pages)

Specifications of MIC2183YQS

Pwm Type

Current Mode

Number Of Outputs

Frequency - Max

440kHz

Duty Cycle

100%

Voltage - Supply

2.9 V ~ 14 V

Buck

Yes

Boost

Flyback

Inverting

Doubler

Divider

Cuk

Isolated

Operating Temperature

-40°C ~ 125°C

Package / Case

16-QSOP

Frequency-max

440kHz

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

576-2160
MIC2183YQS

Available stocks

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Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

MIC2183YQS

Manufacturer:

Micrel Inc

Quantity:

135

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Part Number:

MIC2183YQS

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MICREL/麦瑞

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20 000

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General Description

Micrel’s MIC2183 is a high efficiency PWM synchronous

buck control IC. With its wide input voltage range of 2.9V to

14V, the MIC2183 can be used to efficiently step voltages

down in 1- or 2-cell Li Ion battery powered applications, as

well as in fixed 3.3V, 5V, or 12V systems.

Efficiencies over 90% are achievable over a wide range of

load conditions with the MIC2183’s PWM control scheme.

The operating frequency can be divided by two by raising the

FREQ/2 pin to V

versus board space. It also allows the MIC2183 to be exter-

nally synchronized to frequencies below its nominal 400KHz.

The MIC2183 features an oscillator output, FreqOut, which

can be used to implement a simple charge pump in low

voltage applications. The output of the charge pump can be

fed into the gate drive power circuitry via the V

feature allows enhanced gate drive, hence higher efficiencies

at low input voltages.

MIC2183 also features a 1µA shutdown mode, and a pro-

grammable undervoltage lockout, making it well-suited for

portable applications.

The MIC2183 is available in 16-pin SOP and QSOP packag-

ing options with a junction temperature range from -40°C to

+125°C.

Typical Application

April 2005

MIC2183

120

= 3.3V

Micrel, Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel + 1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com

F (x2)

Adjustable Output Synchronous Buck Converter

6.3V

VINA

EN/UVLO

FreqOut

FREQ/2

VDD

COMP

SYNC

. This allows the user to optimize efficiency

MIC2183

SGND

VINP

OUTN

PGND

OUTP

CSH

CSL

Si9804DY

1nF

(x2)

P pin. This

15m

Si9803DY(x2)

B130

Ω

4.7

Features

• Input voltage range: 2.9V to 14V

• >90% efficiency

• Oscillator frequency of 400kHz

• Frequency divide-by-two pin

• Frequency sync to 600kHz

• FreqOut oscillator output allows simple charge pump

• Front edge blanking

• 5Ω output drivers (typical)

• Soft start

• PWM current mode control

• 1µA shutdown current

• Cycle-by-cycle current limiting

• Frequency foldback short circuit protection

• Adjustable under-voltage lockout

• 16-pin narrow-body SOP and QSOP package options

Applications

• 3.3V to 2.5V/1.8V/1.5V conversion

• DC power distribution systems

• Wireless modems

• ADSL line cards

• 1-and 2-cell Li Ion battery operated equipment

• Satellite Phones

Low Voltage Synchronous Buck PWM Control IC

2.5V @5A

implementation in low voltage systems

220

6.3V

OUT

F (x2)

100

MIC2183

MIC2183 EFFICIENCY

OUTPUT CURRENT (A)

OUT

= 200kHz

= 3.3V

= 2.5V

M9999-042205

Micrel, Inc.

Related parts for MIC2183YQS

MIC2183YQS Summary of contents

Page 1

MIC2183 General Description Micrel’s MIC2183 is a high efficiency PWM synchronous buck control IC. With its wide input voltage range of 2.9V to 14V, the MIC2183 can be used to efficiently step voltages down 2-cell Li Ion ...

Page 2

... MIC2183 Ordering Information Part Number Standard Pb-Free MIC2183BM MIC2183YM MIC2183BQS MIC2183YQS Pin Configuration M9999-042205 Output Voltage Frequency Adj. 200/400KHz Adj. 200/400KHz VINA 1 16 VINP FreqOut 2 15 FREQ OUTP COMP 4 13 OUTN SGND 5 12 PGND SYNC EN/UVLO 7 10 VDD CSL 8 9 CSH ...

Page 3

MIC2183 Pin Description Pin Number Pin Name 1 VINA 2 FreqOut COMP 5 SGND EN/UVLO 8 CSL 9 CSH 10 VDD 11 SYNC 12 PGND 13 OUTN 14 OUTP 15 FREQ/2 16 VINP April ...

Page 4

MIC2183 Absolute Maximum Ratings Supply Voltage ( ......................................... 15V IN IN Digital Supply Voltage (V ) ........................................... 7V DD Comp Pin Voltage (V ) ............................ –0.3V to +3V COMP Feedback Pin Voltage (V ) .......................... –0.3V to ...

Page 5

MIC2183 Parameter Condiion Oscillator Section Oscillator Frequency ( Maximum Duty Cycle V FB Minimum On Time V FB Freq/2 Frequency ( Freq/2 Frequency Foldback Threshold Measured on FB Frequency Foldback Frequency SYNC Threshold Level SYNC ...

Page 6

MIC2183 Typical Characteristics Quiescent Current vs. Input Voltage 6 400kHz VINA VINP 5 4 200kHz STANDBY INPUT VOLTAGE (V) V vs. Load DD 3.005 3.000 ...

Page 7

MIC2183 OUTP Drive Impedance vs. Input Voltage SINK 3 2 SOURCE INPUT VOLTAGE (V) April 2005 7 Micrel, Inc. M9999-042205 ...

Page 8

MIC2183 Functional Diagram C DECOUP EN/UVLO 7 VDD 10 VDD fs/4 SYNC 11 FREQ/2 15 OSC FreqOut 2 ÷2 PWM COMPARATOR SS 3 COMP 4 Functional Characteristics Controller Overview and Functional Description The MIC2183 is a BiCMOS, switched mode, synchronous, ...

Page 9

MIC2183 The MIC2183 controller is broken down into 7 functions. • Control loop • PWM operation • Current mode control • Current limit • Reference, enable and UVLO • FreqOut • MOSFET gate drive • Oscillator and Sync • Soft-start ...

Page 10

MIC2183 MIC2183 1.5V Typical EN/UVLO 140mV (7) R2 Hysteresis (typical) Figure 3. UVLO Circuitry The line voltage turn on trip point is × INPUT ENABLE _ THRESHOLD where the voltage level of ...

Page 11

MIC2183 the oscillator frequency is reduced by approximately a factor of 4. Frequency foldback is used to limit the energy delivered to the output during a short circuit fault condition. The SYNC input (pin 11) lets the MIC2183 synchronize with ...

Page 12

... SEATING 0.0688 (1.748) PLANE 0.0532 (1.351) 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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