LT3029

1

3029fa

TYPICAL APPLICATION

FEATURES

APPLICATIONS

DESCRIPTION

Dual 500mA/500mA

Low Dropout, Low Noise,

Micropower Linear Regulator

out linear regulator. The device operates either with a

common input supply or independent input supplies for

each channel, over an input voltage range of 1.8V to 20V.

Each output supplies up to 500mA of output current with

a typical dropout voltage of 300mV. Quiescent current is

well controlled in dropout. With an external 10nF bypass

100kHz bandwidth. Designed for use in battery-powered

systems, the low 55μA quiescent current per channel makes

it an ideal choice. In shutdown, quiescent current drops to

less than 1μA. Shutdown control is independent for each

channel, allowing for flexible power management.

The LT3029 optimizes stability and transient response with

low ESR ceramic output capacitors, requiring a minimum

of only 3.3μF. The regulator does not require the addition

of ESR, as is common with other regulators.

Internal circuitry provides reverse-battery protection,

reverse-current protection, current limiting with foldback

and thermal shutdown. The device is available as an

adjustable output voltage device with a 1.215V reference

voltage. The LT3029 is offered in the thermally enhanced

16-lead MSOP and 16-lead, low profile (4mm

× 3mm ×

0.75mm) DFN packages.

Independent Input Supply)

Channel

Electrolytic Capacitors

Protection

LTC292X Power Supply Tracking ICs

(4mm

× 3mm) DFN Packages

Dropout Voltage vs Load Current

1.8V

500mA

1.5V

500mA

237k

1%

10nF

3.3μF

113k

1%

3029 TA01

OUT2

ADJ2

BYP2

GND

237k

1%

10nF

3.3μF

54.9k

1%

OUT1

ADJ1

BYP1

LT3029

IN1

2.5V

3.3μF

SHDN1

IN2

SHDN2

OUTPUT CURRENT (mA)

0

400

350

300

250

200

150

100

50

0

400

3029 TA01b

100

200

300

500

50

450

150

250

350

L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear

Technology Corporation. All other trademarks are the property of their respective owners.