LTC7510
Digital DC/DC Controller
with PMBus Interface
FEATURES
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DESCRIPTION
The LTC
®
7510 is a digital DC/DC controller with onboard
non-volatile memory and PMBus interface for real time
reporting and control of point-of-load (POL) power
management. Power supply sequencing, margining, turn-
on/-off and fault detection are easily programmed via the
PMBus interface.
The LTC7510 uses a digital control loop which eliminates
external compensation components. The controller sup-
ports current sharing of multiple ICs; up to four controllers
can be synchronized for multiphase operation.
The LTC7510 provides superior accuracy through
internal calibration to correct current sense error
sources upon start-up and programmable temperature
compensation provides accurate current sensing over
temperature. The LTC7510 is available in a 32-lead (5mm
×
5mm) QFN package.
, LT LTC and LTM are registered trademarks of Linear Technology Corporation.
,
All other trademarks are the property of their respective owners.
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PMBus
TM
Serial Interface for Programming and
Telemetry
Digital PID Control Loop
Output Voltage Range: 0.7V to V
CC
– 0.9V
Optional Resistor-Based PMBus Address, Output
Voltage, Frequency and Current Limit Set
150kHz to 2MHz Switching Frequency
DCR Current Sense with Temperature Compensation
Adjustable Active Voltage Positioning (AVP) Control
On-Chip Non-Volatile Memory (NVM) for
Configuration Storage
Soft-Start Into Pre-Biased Load
Current Sharing
32-Lead (5mm
×
5mm) QFN Package
APPLICATIONS
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Digital Power System Management
Intelligent Point-of-Load (POL) Power Regulation
TYPICAL APPLICATION
DC/DC Controller with Read/Write PMBus Digital Interface
+12V
V
DRIVE
+5V
SDA
SMBus
INTERFACE
SCL
SMBALERT_N
V
D33
LTC7510
POWER
MANAGEMENT
INTERFACE
FAULT
OUTPUTS
PWRGD
OUTEN
FAULT1
FAULT2
GND
PWM
TEMPSEN
I
SENN
I
SENP
V
SENP
SADDR_L
SADDR_M
V
SENN
V
SET
F
SET
V
TRIM
I
MAXSET
OPTIONAL
7510 TA01
VINSEN
V
CC
BOOST
TG
V
CC
LTC4443-1
V
LOGIC
IN
GND
TS
BG
V
D25
V
OUT
LOAD
RTN
7510fa
1
LTC7510
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PIN CONFIGURATION
SMB_ALERT_N
TOP VIEW
TEMPSEN
24 V
D33
23 NC
22 NC
33
21 I
SENN
20 I
SENP
19 I
SH_GND
18 V
SENN
17 V
SENP
9 10 11 12 13 14 15 16
V
SET
NC
f
SET
NC
I
SH
SYNC_IN
SYNC_OUT
V
INSEN
FAULT1
FAULT2
Supply Voltage (V
CC
) ................................... –0.3V to 6V
V
SENP
, V
SENN
................................................ –0.3V to 3V
I
SENP
, I
SENN
.................................................–0.3V to V
CC
OUTEN, SYNC_IN, SYNC_OUT, SMBALERT_N,
PWRGD, PWM, SDA, SCL, FAULT1,
FAULT2, SADDR_M ...................................... –0.3V to 6V
All Other Pins .......................................... –0.3V to 4.25V
Differential Voltage
V
SEN_DIFF
(V
SENP
– V
SENN
) .................... –0.3V to 2.5V
Operating Temperature Range (Note 2).... –40°C to 85°C
Junction Temperature ........................................... 125°C
Storage Temperature Range................... –65°C to 150°C
Write Temperature ....................................... 0°C to 85°C
Read Temperature .................................... –40°C to 85°C
PWM
SCL
32 31 30 29 28 27 26 25
V
D25
1
SDA 2
SADDR_L 3
PWRGD 4
SADDR_M 5
OUTEN 6
I
MAXSET
7
V
TRIM
8
UH PACKAGE
32-LEAD (5mm
×
5mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JA
= 34°C/W
EXPOSED PAD (PIN 33) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LTC7510EUH#PBF
LTC7510IUH#PBF
TAPE AND REEL
LTC7510EUH#TRPBF
LTC7510IUH#TRPBF
PART MARKING*
7510
7510
PACKAGE DESCRIPTION
32-Lead (5mm
×
5mm) Plastic QFN
32-Lead (5mm
×
5mm) Plastic QFN
TEMPERATURE RANGE
–40°C to 85°C
–40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to:
http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to:
http://www.linear.com/tapeandreel/
V
CC
NC
7510fa
2
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
LT 0308 REV A • PRINTED IN USA
FAX: (408) 434-0507
●
www.linear.com
©
LINEAR TECHNOLOGY CORPORATION 2008
Embedded System
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