LTM4709

1

Rev. 0

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TYPICAL APPLICATION

FEATURES

DESCRIPTION

Triple 3A, Ultralow Noise, High PSRR, Ultrafast µModule

Linear Regulator with Configurable Output Array

The LTM®4709 is a low voltage, triple 3A µModule

linear regulator offering a high power supply rejection

ratio  (PSRR), ultralow noise, and ultrafast transient

response. The µModule regulator includes low dropout

linearregulators(LDO),capacitors,andresistors.Operating

over an input voltage range of 0.6V to 5.5V, the LTM4709

supports an output voltage range of 0.5V to 4.2V for

triple 3A channels with a typical dropout voltage of 45mV.

The output voltage is digitally configurable in 50mV

increments from 0.5V to 1.2V; 100mV increments from

1.2V to 1.8V; and discrete levels at 2V, 2.5V, 3V, 3.3V,

and 4.2V. A precision current monitor provides accurate

current monitoring for the energy management system

and current limit. The LTM4709 is ideal for RF communi-

cation, noise-sensitive instrumentation, post-regulation

for switching regulators, high-performance FPGAs, and

microprocessors. Only input, output, and bias ceramic

capacitors are needed for its application.

Fault protection features include UVLO, power good, over-

current, and overtemperature protection. The LTM4709 is

offered in 6mm × 12mm × 1.92mm, 98-pin BGA package

with 0.8mm ball pitch.

Configurable Output Array

3A

3A

3A

6A

3A

9A

Triple 3A µModule Regulator

APPLICATIONS

n

Linear Regulator µModule® with Triple 3A Output

n

Input Voltage: 0.6V to 5.5V

n

Configurable Output Voltage: 0.5V to 4.2V

n

Ultralow RMS Noise: 1.3μVRMS (10Hz to 100kHz)

n

High Frequency PSRR: 51dB at 1MHz

n

Low Dropout Voltage: 45mV Typical at 3A

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Ultrafast Transient Response

n

50% Smaller Than Discrete Solutions

n

±1.5% Output Voltage Regulation Over Line, Load,

and Temperature

n

±2.4% Precision Current Monitor Accuracy at 3A

n

Stable with Ceramic Output Capacitors (10μF Minimum)

n

Parallel Multiple Devices for Higher Current

n

PG Flag, UVLO, Overcurrent and

Overtemperature Protection

n

150°C Rated Available

n

6mm × 12mm × 1.92mm BGA Package

n

RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs

n

High Speed/High Precision Data Converter

n

FPGA, DSP, and Microprocessor Power Supplies

n

High-Speed Servers and Storage Devices

n

Medical and Healthcare

n

Very-Low-Noise Instrumentation

n

Post-Regulation for Switching Supplies

All registered trademarks and trademarks are the property of their respective owners.

VIN PSRR at 1VOUT and 3A

LTM4709

IMONR1

PGR1,2,3

VO10

VO11

VO12

EN1,2,3

BIAS1,2,3

VO30

VO31

VO32

VO20

VO21

VO22

VOUTS1

VIN1

VIN2

VOUTS2

GND

VIN3

VOUT2

VOUT3

VOUTS3

VOUT1

IMONR3

IMONR2

3.3VBIAS

1.3VIN

10 F

× 3

4709 TA01a

22 F

22 F

22 F

0.9VOUT3

1VOUT2

0.8VOUT1

PINS NOT USED:

PG1,2,3

VIOC1,

IMON1,2,3,

VREF1,2,3

VIN = 1.3V, COUT = 22 F

FREQUENCY (Hz)

10

100

1k

10k

100k

1M

10M

0

20

40

60

80

100

120

4709 TA1b