説明

LTM4616 is a low-voltage high current output switch type DC/DC regulator submodule (μ ModeleTM). In small LGA lead-free packages, there are supporting components such as switch type controller chips, power MOSFETs, inductors, capacitors, etc. Due to its ability to operate in prominent mode, pulse skipping mode, and spread spectrum mode, it has very high efficiency under light loads and reduces switching noise. LTM4616 adopts current mode control to provide output overvoltage, overcurrent, and thermal shutdown protection, thereby improving the reliability of the system.

The LTM4616 is a complete dual 2-phase 8A per channel switch mode DC/DC power regulator system in a 15mm × 15mm surface mount LGA or BGA package. Included in the package are the switching controller, power FETs, inductor and all support components. Operating from an input voltage range of 2.7V to 5.5V, the LTM4616 supports two outputs within a voltage range of 0.6V to 5V, each set by a single external resistor. This high efficiency design delivers up to 8A continuous current (10A peak) for each output. Only bulk input and output capacitors are needed, depending on ripple requirement. The part can also be configured for a 2-phase single output at up to 16A.

The low profile package enables utilization of unused space on the back side of PC boards for high density point-ofload regulation.

Fault protection features include overvoltage protection, overcurrent protection and thermal shutdown. The design of product packaging aims to save space and enhance heat resistance. The LTM4616 is available with SnPb or RoHS compliant terminal finish.

 

特徴

Complete Dual DC/DC Regulator System
Input Voltage Range: 2.7V to 5.5V
Dual 8A Outputs, or Single 16A Output with a 0.6V to 5V Range
Output Voltage Tracking and Margining
±1.75% Total DC Output Error (–55°C to 125°C)
電流モード制御/高速過渡応答
Power Good Tracking and Margining
Overcurrent/Thermal Shutdown Protection
Onboard Frequency Synchronization
Spread Spectrum Frequency Modulation
Multiphase Operation
選択可能なバースト・モード®動作
出力過電圧保護
SnPb (BGA) or RoHS Compliant (LGA and BGA) Finish
Small Surface Mount Footprint, Low Profile

 

アプリケーション

  • Storage and ATCA, PCI Express Cards
  • Battery Operated Equipment
  • Telecom, Networking and Industrial Equipment

 

Absolute bsolute Maximmumm RRatings

VIN1, SVIN1, VIN2, SVIN2：–0.3V to 6V C

LKOUT1, CLKOUT2 ：–0.3V to 2V

PGOOD1, PLLLPF1, CLKIN1, PHMODE1, MODE1, PGOOD2, PLLLPF2, CLKIN2, PHMODE2, MODE2：–0.3V to VIN

ITH1, ITHM1, RUN1, FB1, TRACK1, MGN1, BSEL1, ITH2, ITHM2, RUN2, FB2, TRACK2, MGN2, BSEL2：–0.3V to VIN

VOUT1, VOUT2, SW1, SW2：–0.3V to VIN Internal Operating Temperature Range E- and I-Grades：–40°C to125°C

MP-Grade：–55°C to 125°C

Junction Temperature ：125°C

Storage Temperature Range：–55°C to 125°C

The LTM4616 is tested under pulsed load conditions, such that TJ ≈ TA. The LTM4616E is guaranteed to meet performance specifications over the 0°C to 125°C internal operating temperature range. Specifications over the –40°C to 125°C internal operating temperature range are assured by design, characterization and correlation with statistical process controls. The LTM4616I is guaranteed to meet specifications over the –40°C to 125°C internal operating temperature range. The LTM4616MP is guaranteed and tested over the –55°C to 125°C internal operating temperature range. Note that the maximum ambient temperature consistent with these specifications is determined by specific operating conditions in conjunction with board layout, the rated package thermal resistance and other environmental factors.

TJMAX = 125°C, θJA = 10.5°C/W, θJCbottom = 2°C/W, θJCtop = 16°C/W, WEIGHT = 1.8g

Stresses beyond those listed under Absolute Maximum Ratings may cause permanent damage to the device. Exposure to any Absolute Maximum Rating condition for extended periods may affect device reliability and lifetime.