MIC2619YD6 TR Micrel Inc, MIC2619YD6 TR Datasheet

MIC2619YD6 TR

Manufacturer Part Number

MIC2619YD6 TR

Description

IC CONV PWM BOOST 1.2MHZ 6TSOT

Manufacturer

Micrel Inc

Type

Step-Up (Boost), PWM - Current Moder

Datasheet

1.MIC2619YD6_TR.pdf (15 pages)

Specifications of MIC2619YD6 TR

Internal Switch(s)

Yes

Synchronous Rectifier

Number Of Outputs

Voltage - Output

Up to 35V

Current - Output

350mA

Frequency - Switching

1.2MHz

Voltage - Input

2.8 ~ 6.5 V

Operating Temperature

-40°C ~ 125°C

Mounting Type

Surface Mount

Package / Case

TSOT-23-6, TSOT-6

Voltage - Supply

2.8 V ~ 6.5 V

Frequency-max

1.2MHz

Duty Cycle

90%

Pwm Type

Current Mode

Buck

Boost

Yes

Flyback

Inverting

Doubler

Divider

Cuk

Isolated

Primary Input Voltage

6.5V

No. Of Outputs

Output Voltage

35V

Output Current

350mA

Voltage Regulator Case Style

SOT-23

No. Of Pins

Operating Temperature Range

-40Â°C To +125Â°C

Svhc

No SVHC

Lead Free Status / RoHS Status

Lead free / RoHS Compliant

Other names

576-3655-2
MIC2619YD6 TR
MIC2619YD6TR

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General Description

The MIC2619 is a 1.2MHz pulse width modulated (PWM)

step-up switching regulator that is optimized for low power,

high output voltage applications. With a maximum output

voltage of 35V, and a switch current of over 350mA, the

MIC2619 can easily supply most high voltage bias

applications, such as TV tuners.

The MIC2619 implements a constant frequency 1.2MHz

PWM current-mode control scheme. The high frequency

PWM operation saves board space by reducing external

component sizes. The additional benefit of the constant

frequency PWM control scheme as opposed to variable

frequency control schemes is lower output noise and

smaller input ripple injected back to the battery source.

The MIC2619 has programmable overvoltage protection to

ensure output protection in case of fault condition.

The MIC2619 is available in a low profile Thin SOT-23 6-

pin package. The MIC2619 has a junction temperature

range of –40°C to +125°C.

All support documentation can be found on Micrel’s web

site at: www.micrel.com.

Typical Application

_________________________________________________________________________________________________________________________

March 2010

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

1.2MHz Boost Converter with OVP in Thin SOT-23-6

Features

• 2.8V to 6.5V Input Voltage

• 350mA Switch Current

• Output Voltage up to 35V

• 1.2MHz PWM Operation

• 1.265V Feedback Voltage

• Programmable Over-Voltage Protection (OVP)

• <1% Line Regulation

• <1µA Shutdown Current

• Over-Temperature Protection

• Under-Voltage Lock Out (UVLO)

• Low Profile Thin SOT-23-6 Package

• –40°C to +125°C Junction Temperature Range

Applications

• Bias Supply Applications:

• DSL/Broadband applications

• Constant Current Power Supplies

Tuner Varactor Bias

High Voltage Bias Supplies

Avalanche Photo Diode

High Voltage Display Bias

1.2MHz PWM Boost Converter

MIC2619

with OVP

M9999-030410-A

Related parts for MIC2619YD6 TR

MIC2619YD6 TR Summary of contents

Page 1

... All support documentation can be found on Micrel’s web site at: www.micrel.com. _________________________________________________________________________________________________________________________ Typical Application Micrel Inc. • 2180 Fortune Drive • San Jose, CA 95131 • USA • tel +1 (408) 944-0800 • fax + 1 (408) 474-1000 • http://www.micrel.com March 2010 Features • 2.8V to 6.5V Input Voltage • ...

Page 2

Micrel, Inc. Ordering Information Part Number Marking MIC2619YD6 2619 Note: 1. Under bar( ) symbol may not be to scale. Pin Configuration Pin Description Pin Number Pin Name Pin Function 1 SW Switch Node (Input): Internal power bipolar collector. 2 ...

Page 3

Micrel, Inc. Absolute Maximum Ratings Supply Voltage (V ) .........................................................7V IN Switch Voltage (V )....................................... –0.3V to 40V SW Enable Pin Voltage (V )..................................... –0 Feedback Voltage ( )........................................6V FB OVP Ambient Storage Temperature (T ...

Page 4

Micrel, Inc. Typical Characteristics Efficiency OUT 100% 90% 80% 70% 60% V =4. =3.6V 50 =3V IN 40% 30% 20 10µH 10 1µ 100 150 LOAD ...

Page 5

Micrel, Inc. Typical Characteristics (Continued) Feedback Voltage vs. T emperature 1.34 1.32 1.30 1.28 1. 12V 25mA 10µH 1. 1µF 1.18 -40 ...

Page 6

Micrel, Inc. Functional Characteristics March 2010 6 MIC2619 M9999-030410-A ...

Page 7

Micrel, Inc. Functional Characteristics (Continued) March 2010 7 MIC2619 M9999-030410-A ...

Page 8

Micrel, Inc. Functional Diagram Functional Description The MIC2619 is a constant frequency, PWM current mode boost regulator composed of an oscillator, slope compensation ramp generator, current amplifier, g error amplifier, PWM generator, and bipolar output m transistor. The ...

Page 9

Micrel, Inc. FB The feedback pin provides the control path to control the output. FB requires a resistor divider network to the output and GND to set the output voltage. SW The switching pin connects directly to one end of ...

Page 10

Micrel, Inc. Application Information DC-to-DC PWM Boost Conversion The MIC2619 is a constant-frequency boost converter. It can convert a low DC input voltage to a higher DC output voltage. Figure 1 shows a typical circuit. Boost regulation is achieved by ...

Page 11

Micrel, Inc. saturate the inductor. Peak current can be calculated as follows: ⎡ − ⎛ ⎜ ⎢ PEAK OUT OUT ⎝ 2 ⎣ As shown by the previous calculation, the peak inductor current ...

Page 12

Micrel, Inc. MIC2619 Evaluation Board Schematic Bill of Materials Item Part Number C1 C1608X5R1A105K GRM185R61A105KE36D 0603ZD105KT2A C2 TAJA106M010R C3 C1608X7R11H223K GRM188R71H223KA01D 06035C223JAT2A C4 08055D105MAT2A GRM21BR71H105KA12L CL21B105KBFNNNE D1 SK14 B140/B L1 C1G22L100MNE VLF3012ST-100MR59 LQH32PN100MN0L R1 CRCW0603267KFKEA R2, R5 CRCW060310K0FKEA R3 CRCW0603100KFKEA ...

Page 13

Micrel, Inc. Recommended Layout March 2010 Top Layout Bottom Layout 13 MIC2619 M9999-030410-A ...

Page 14

Micrel, Inc. Package Information March 2010 6-Pin TSOT (YD6) 14 MIC2619 M9999-030410-A ...

Page 15

Micrel, Inc. Recommended Land Pattern 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 ...

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