Microchip logo
  • All
  • Products
  • Documents
  • Applications Notes
product primary image

MIC68400

4A Sequencing LDO with Ramp Control and Tracking

Status: In Production

Features:

  • Stable with 10µF ceramic capacitor
  • Input voltage range: 1.65V to 5.5V
  • 0.5V reference
  • ±2.0% output tolerance over temperature
  • 4A maximum output current - peak start up
  • 3A continuous operating current
  • Tracking on turn-on and turn-off with pin strapping
  • Timing controlled sequencing on/off
  • Programmable Ramp Control™ for in-rush current limiting and slew rate control of the output voltage during Turn-On and Turn-Off
  • Power-on reset (POR) supervisor with programmable delay time
  • Single Master can control multiple Slave regulators with tracking output voltages
  • Maximum dropout (VIN - VOUT) of 500mV over temperature at 3A output current
  • Fixed and adjustable output voltages
  • Excellent line and load regulation specifications
  • Logic controlled shutdown
  • Thermal shutdown and current limit protection
View More
Overview
Documents
Development Environment
RoHS Information
Add To Cart

Device Overview

Summary

The MIC68400 is a high peak current LDO regulator designed specifically for powering applications such as FPGA core voltages that require high start up current with lower nominal operating current. The MIC68400 can also implement a variety of power-up and power-down protocols such as sequencing, tracking, and ratiometric tracking.

The MIC68400 operates from a wide input range of 1.65V to 5.5V, which includes all of the main supply voltages commonly available today. It is designed to drive digital circuits requiring low voltage at high currents (i.e. PLDs, DSP, microcontroller, etc.). The MIC68400 incorporates a delay pin (Delay) for control of power on reset (POR) output at turn-on and power-down delay at turn-off. In addition there is a ramp control (RC) pin for either tracking applications or output voltage slew rate adjustment at turn-on and turn-off. This is important in applications where the load is highly capacitive and in-rush currents can cause supply voltages to fail and microprocessors or other complex logic chips to hang up.

Multiple MIC68400s can be daisy-chained in two modes. In tracking mode the output voltage of the Master drives the RC pin of a Slave so that the Slave tracks the main regulator during turn-on and turn-off. In sequencing mode the POR of the Master drives the enable (EN) of the Slave so that it turns on after the Master and turns off before (or after) the Master. This behavior is critical for power-up and power-down control in multi-output power supplies. The MIC68400 is fully protected offering both thermal, current limit protection, and reverse current protection. The MIC68400 has a junction temperature range of -40°C to +125°C and is available in fixed as well as an adjustable option.

Additional Features
    • Stable with 10µF ceramic capacitor
    • Input voltage range: 1.65V to 5.5V
    • 0.5V reference
    • ±2.0% output tolerance over temperature
    • 4A maximum output current - peak start up
    • 3A continuous operating current
    • Tracking on turn-on and turn-off with pin strapping
    • Timing controlled sequencing on/off
    • Programmable Ramp Control™ for in-rush current limiting and slew rate control of the output voltage during Turn-On and Turn-Off
    • Power-on reset (POR) supervisor with programmable delay time
    • Single Master can control multiple Slave regulators with tracking output voltages
    • Maximum dropout (VIN - VOUT) of 500mV over temperature at 3A output current
    • Fixed and adjustable output voltages
    • Excellent line and load regulation specifications
    • Logic controlled shutdown
    • Thermal shutdown and current limit protection
Parametrics
Name
Value
Product Type
Single LDOs
# of Out
1
IOUT #1
4000
IOUT #2
n/a
IOUT #3
n/a
IOUT #4
n/a
IOUT (mA)
4000
VIN Min (V)
1.65
VIN Max (V)
5.5
VOUT (V)
1.8, Adj
Voltage Drop Typ (mV)
360
IGND Typ (µA)
1200
Tol Typ %
±2
PSRR 1 kHz (dB)
50
Soft Start Pin
Yes
Load Dump
Rev Bat
Reverse Current Protect

Documents

Jump to:

Data Sheets

Development Environment

  • Demo & Evaluation Boards
Demo & Evaluation Boards
MIC68400YML Evaluation Board
MIC68400YML Evaluation Board ( MIC68400YML-EV )

This eval board is used to demonstrate the MIC68400. The MIC68400 is a high peak current LDO regulator designed specifically for powering applications such as FPGA core voltages that require high start up current with lower nominal operating current.

Learn More
Add To Cart

RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC68400-1.8YML-TR
0.040900
0.820200
16
VQFN
4x4x0.9mm
NiPdAu
e4
MIC68400-1.2YML-TR
0.040900
0.820200
16
VQFN
4x4x0.9mm
NiPdAu
e4
MIC68400YML-TR
0.040900
0.820200
16
VQFN
4x4x0.9mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

Buy from the Microchip Store

Grid
View
Table
View
Filter:
Apply
Clear
Only show products with samples
Product
Leads
Package Type
Temp Range
Packing Media
5K Pricing
Buy