ETA9020

www.ETAsolution.com

Outperform with Efficiency

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1

3-Channel Power Management Units for ADSL Modems & Set-top Boxes

DESCRIPTION

The ETA9020 power-management IC (PMIC) consists of a 1A

synchronous buck regulator, a 500mA LDO and a unique,

patent-pending configurable PWM controller. This

controller can be either configured as a current-mode

step-down converter or a step-up converter with external

MOSFET or BJT and a Shottky diode. This configuration

scheme makes this PMIC a complete power solution for

next generation set-top boxes. It is a much more superior

solution to systems that are stilling using 34063 type of

ICs as power supplies. Besides needing much fewer

external components, providing much higher efficiency, it

also provides flexibility for system designer to easily tailor

the power supply design for different system requirements.

For example, ETA9020 can be configured as two

Step -down converters and one LDO, or as one Step-down,

one Step-up converter and one LDO.

The ETA9020 is housed in a thin QFN3x3-16pin package.

APPLICATIONS



ADSL Modems



Set-top Boxes



High efficiency 34063 replacements

FEATURES



One 1A Synchronous Step-Down



One Configurable DC-DC PWM Controller



One 500mA LDO



QFN3x3-16L Package

TYPICAL APPLICATION

10uF

VIN

VOUT2

VOUT1

LDOOUT

LDOIN

VIN

IPK

PDRN

FB2

GND

LX1

LDOO

ADJ

LDOIN

FB1

Fig.1

ETA9020 configured as Two step-down converters and one LDO

100mΩ

47uF

36k

160k

L2 12uH

2.2nF

100k

88pF

10pF

120k

270k

100pF

43k

4.7nF

75k

240k

47uF

2.2uF

L1 12uH