MAX1533 데이터 시트보기 (PDF) - Maxim Integrated

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MAX1533

High-Efficiency, 5x Output, Main Power-Supply Controllers for Notebook Computers

Maxim Integrated 

High-Efficiency, 5x Output, Main Power-Supply

Controllers for Notebook Computers

Table 1. Component Selection for Standard Applications

COMPONENT

Input Voltage

CIN_, Input Capacitor

COUT5, Output Capacitor

COUT3, Output Capacitor

NH_ High-Side MOSFET

NL_ Low-Side MOSFET

DL_ Schottky Rectifier

(if needed)

Inductor/Transformer

RCS

5A/300kHz

VIN = 7V to 24V

(2) 10µF, 25V

Taiyo Yuden TMK432BJ106KM

150µF, 6.3V, 40mΩ, low-ESR capacitor

Sanyo 6TPB150ML

220µF, 4V, 40mΩ, low-ESR capacitor

Sanyo 4TPB220ML

Fairchild Semiconductor FDS6612A

International Rectifier IRF7807V

Fairchild Semiconductor FDS6670S

International Rectifier IRF7807VD1

2A, 30V, 0.45Vf

Nihon EC21QS03L

T1 = 6.8µH, 1:2 turns Sumida 4749-T132

L1 = 5.8µH, 8.6A Sumida CDRH127-5R8NC

10mΩ ±1%, 0.5W resistor

IRC LR2010-01-R010F or

Dale WSL-2010-R010F

5A/500kHz

VIN = 7V to 24V

(2) 10µF, 25V

Taiyo Yuden TMK432BJ106KM

150µF, 6.3V, 40mΩ, low-ESR capacitor

Sanyo 6TPB150ML

220µF, 4V, 40mΩ, low-ESR capacitor

Sanyo 4TPB220ML

Fairchild Semiconductor FDS6612A

International Rectifier IRF7807V

Fairchild Semiconductor FDS6670S

International Rectifier IRF7807VD1

2A, 30V, 0.45Vf

Nihon EC21QS03L

3.9µH

Sumida CDRH124-3R9NC

10mΩ ±1%, 0.5W resistor

IRC LR2010-01-R010F or

Dale WSL-2010-R010F

Table 2. Component Suppliers

SUPPLIER

WEBSITE

AVX

www.avx.com

Central Semiconductor www.centralsemi.com

Coilcraft

www.coilcraft.com

Coiltronics

www.coiltronics.com

Fairchild Semiconductor www.fairchildsemi.com

International Rectifier www.irf.com

Kemet

www.kemet.com

SUPPLIER

Panasonic

Sanyo

Sumida

Taiyo Yuden

TDK

TOKO

Vishay (Dale, Siliconix)

WEBSITE

www.panasonic.com/industrial

www.secc.co.jp

www.sumida.com

www.t-yuden.com

www.component.tdk.com

www.tokoam.com

www.vishay.com

Detailed Description

The MAX1533/MAX1537 standard application circuit

(Figure 1) generates the 5V/5A and 3.3V/5A typical of the

main supplies in a notebook computer. The input supply

range is 7V to 24V. See Table 1 for component selections

and Table 2 for component manufacturers.

The MAX1533/MAX1537 contain two interleaved fixed-

frequency step-down controllers designed for low-

voltage power supplies. The optimal interleaved archi-

tecture guarantees out-of-phase operation, reducing

the input capacitor ripple. Two internal LDOs generate

the keep-alive 5V and 3.3V power. The MAX1537 has

an auxiliary LDO that can be configured to the preset

12V output or an adjustable output.

Fixed Linear Regulators (LDO5 and LDO3)

Two internal linear regulators produce preset 5V (LDO5)

and 3.3V (LDO3) low-power outputs. LDO5 powers

LDO3, the gate drivers for the external MOSFETs, and

provides the bias supply (VCC) required for the SMPS

analog control, reference, and logic blocks. LDO5

supplies at least 100mA for external and internal loads,

including the MOSFET gate drive, which typically varies

from 5mA to 50mA, depending on the switching frequen-

cy and external MOSFETs selected. LDO3 also supplies

at least 100mA for external loads. Bypass LDO5 and

LDO3 with a 2.2µF or greater output capacitor, using an

additional 1.0µF per 20mA of internal and external load.

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