LINEAR TECHNOLOGY - LTC2927 Data Sheet User Manual
Summary
The LTC2927 is an advanced single power supply tracking controller designed for managing complex multiple voltage rails in digital systems. It provides reliable, highly configurable power sequencing and accurate ramp-up/ramp-down capabilities, ensuring system stability across different supply states without added loss elements. Ideal for mission-critical applications like microprocessors, DSPs, and FPGAs, this controller allows precise synchronization of supplies at the load point. The comprehensive manual details its core features, electrical characteristics, application examples, and pinout information for seamless integration into power management circuits.
Page 1 Text Content
LTC2927
Single Power Supply Tracking Controller FEATURES DESCRIPTIO
n Flexible Power Supply Tracking The LTC®2927 provides a simple solution to power supply n Tracks Both Up and Down tracking and sequencing requirements. By selecting a few n Power Supply Sequencing resistors, the supply can be confi gured to ramp-up and n Supply Stability is Not Affected ramp-down with differing ramp rates, voltage offsets, or n Low Pin Count time delays relative to other supplies or a master signal. n Controls Single Supply without Series FETs
By forcing current into a feedback node of an independent
n Adjustable Ramp Rate
supply, the LTC2927 causes the output to track a ramp
n Supply Shutdown Output
signal without inserting any pass element losses. Because
n Available in 8-Lead Thin SOT™ and 8-Lead
the current is controlled in an open-loop manner, the
(3mm × 2mm) DFN Packages
LTC2927 does not affect the transient response or stabil- ity of the supply. The compact solution at point of load APPLICATIO minimizes the trace length of the DC/DC circuit sensitive FB node. Furthermore, it presents a high impedance when
n VCORE and VI/O Supply Tracking
power-up is complete, effectively removing it from the
n Microprocessor, DSP and FPGA Supplies
DC/DC circuit.
n Multiple Supply Systems
, LT, LTC and LTM are registered trademarks of Linear Technology Corporation. n Point-of-Load Supplies Thin SOT is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Patents Pending.
TYPICAL APPLICATIO
EARLY VIN Track-Up and Track-Down Waveforms
VCC ON RAMP
0.1μF VIN
100k RAMP
LTC2927
(3.3V) SDO RUN/SS IN 2.5V 1.8V1V/DIV
DC/DC
RAMPBUF
16.5k FB FB = 1.235V OUT 1.8V
TRACK
GND 35.7k13k
2927 TA01b10ms/DIV
EARLY VIN 3.3V 0.1μF
ON RAMP VIN
LTC2927
1V/DIV
SDO RUN/SS IN 1.8V
DC/DC
RAMPBUF
887k FB FB = 0.8V OUT 2.5V
TRACK
GND 412k412k
2927 TA01c10ms/DIV
2927 TA01a
2927fb
Page Summary Contents For LINEAR TECHNOLOGY - LTC2927 Data Sheet User Manual
Manual Details
| Brand | Linear |
|---|---|
| Pages | 16 |
| File Size | 264.36 KB |
| Published | June 21, 2026 |
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Frequently Asked Questions
What kind of tracking does the LTC2927 support?
It tracks both Up and Down tracking, and can be configured to ramp up or ramp down with differing rates or voltage offsets.
How does it manage supply shutdown without loss?
Because current is controlled in an open-loop manner via the FB node, it shuts down without inserting any pass element losses.
Does using the LTC2927 affect circuit stability?
No, its compact point-of-load solution minimizes trace length and does not affect the transient response or stability of the supply.
What is one key feature for multiple supplies?
The device can control single supplies without needing Series FETs, which keeps the current controlled at an open-loop manner.