DESCRIPTION
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
linear regulators (LDO), capacitors, and resistors. 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 communication,
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, overcurrent,
and overtemperature protection. The LTM4709 is
offered in 6mm × 12mm × 1.92mm, 98-pin BGA package with 0.8mm ball pitch.

FEATURES
- Linear Regulator μModule® with Triple 3A Output
- Input Voltage: 0.6V to 5.5V
- Configurable Output Voltage: 0.5V to 4.2V
- Ultralow RMS Noise: 1.3μVRMS (10Hz to 100kHz)
- High Frequency PSRR: 51dB at 1MHz
- Low Dropout Voltage: 45mV Typical at 3A
- Ultrafast Transient Response
- 50% Smaller Than Discrete Solutions
- ±1.5% Output Voltage Regulation Over Line, Load, and Temperature
- ±2.4% Precision Current Monitor Accuracy at 3A
- Stable with Ceramic Output Capacitors (10μF Minimum)
- Parallel Multiple Devices for Higher Current
- PG Flag, UVLO, Overcurrent and Overtemperature Protection
- 150°C Rated Available
- 6mm × 12mm × 1.92mm BGA Package

APPLICATIONS
- RF Power Supplies: PLLs, VCOs, Mixers, LNAs, PAs
- High Speed/High Precision Data Converter
- FPGA, DSP, and Microprocessor Power Supplies
- High-Speed Servers and Storage Devices
- Medical and Healthcare
- Very-Low-Noise Instrumentation
- Post-Regulation for Switching Supplies