Electrical Specifications Subject to Change
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 controlling of point-of-load (POL) power
management attributes such as current, voltage, and
operating frequency and temperature. Power supply se-
quencing, margining, turn-on/off are easily programmed via
the PMBus interface. The LTC7510 also provides extensive
POL fault detection reporting capability.
The LTC7510 uses a digital control loop to eliminate external
compensation components. The controller supports current
sharing of multiple ICs in high power designs. Up to four
controllers can be synchronized for multiphase operation.
The LTC7510 provides superior accuracy through internal
calibration that measures and corrects current sense er-
ror sources upon startup. Programmable current sense
temperature compensation allows the designer to tailor
the response for best accuracy over temperature. The
LTC7510 is available in the 32-lead 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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Digital PID Control Loop with 4x Voltage Oversampling
PMBus™ Serial Interface
- Query Voltage, Current, Temperature, and Faults
- Voltage Set and Adjustment
- Open Loop Tracking, Sequencing, Margining
- Over-ride Hardwired Settings
Resistor Based PMBus Address, Output Voltage,
Frequency, and Current Limit Set
150kHz to 2MHz Switching Frequency
Output Voltage Range: 0.7V to 3.6V
DCR Current Sense with Temperature Compensation
Internal Non-Volatile Memory (NVM) to Store
Custom Configurations
Extensive Fault Detection Capability
Soft-Start into Pre-Biased Load
Current Sharing Between Multiple LTC7510 Devices
Programmable Droop Control (Loadline)
32-Lead 5mm
×
5mm QFN Package
APPLICATIONS
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Intelligent Point-of-Load (POL) Power Regulation
TYPICAL APPLICATION
Typical Application for Single-Channel Operation
5V TO 12V
5V
SDATA
PMBus
INTERFACE
SCLK
SMB_AL_N
LTC7510
POWER
MANAGEMENT
INTERFACE
MULTIPHASE
OPERATION
PWRGD
OUTEN
PWM
SYNC_IN
SYNC_OUT
R
CM
TEMPSEN
I
SENN
FAULT
OUTPUTS
FAULT1
FAULT2
I
OUT/ISH
I
SH_GND
RESET_N
I
SENP
V
SENP
V
SENN
I-SHARE
SADDR
V
SET
F
SET
V
TRIM
I
MAXSET
7510 TA01
R1
V
12SEN
V
CC
V
D33
V
D25
GND
+
R2
DRIVER
UGATE
BOOST
PWM
GND
D1
LOAD
R
SENSE
PHASE
EN
V
CC
LGATE
V
OUT
RTN
7510p
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
1
LTC7510
ABSOLUTE MAXIMUM RATINGS
(Note 1)
PACKAGE/ORDER INFORMATION
TOP VIEW
SMB_AL_N
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
SYNC_OUT
SYNC_IN
RESET_N
I
OUT
/I
SH
V
SET
FSET
V
12SEN
NC
FAULT1
FAULT2
SCLK
PWM
Supply Voltage (V
CC
) ................................... –0.3V to 6V
V
SENP
, V
SENN
................................................ –0.3V to 3V
OUTEN, SYNC_IN, SYNC_OUT,
SMB_AL_N, PWRGD, RESET_N,
PWM, SDATA, SCLK ...................................–0.3 to 6V
All Other Pins ............................................–0.3 to 4.25V
Differential Voltage
V
SEN_DIFF
(V
SENP
– V
SENN
) .......................–0.3 to 2.5V
Junction Temperature ........................................... 125°C
Storage Temperature Range................... –65°C to 125°C
Operating Temperature Range ..................... 0°C to 85°C
32 31 30 29 28 27 26 25
V
D25
1
SDATA 2
SADDR 3
PWRGD 4
NC 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 PART NUMBER
LTC7510CUH
QFN PART MARKING
7510
Order Options
Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking:
http://www.linear.com/leadfree/
Consult LTC Marketing for parts specified with wider operating temperature ranges.
BLOCK DIAGRAM
SYNC_IN
F
SET
V
SET
V
TRIM
V
SENP
V
SENN
V
12SEN
TEMPSEN
I
SENP
I
SENN
I
MAXSET
SCLK
SDATA
SADDR
RESET_N
OUTEN
STATE MACHINE
SMBus
NON-VOLATILE MEMORY
(NVM)
FAULT
HANDLER
CURRENT
SENSE
V
CC
V
D33
V
D25
SMB_AL_N
FAULT1
FAULT2
PWRGD
TEMPERATURE
SENSE
ADC
PID/PWM
CONTROLLER
PWM
VOLTAGE
SENSE
REFERENCE
AND
OSCILLATOR
SYNC_OUT
DAC
I
OUT/ISH
I
SH_GND
GND
(EXPOSED PAD)
V
CC
NC
7510p
2
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
(408) 432-1900
●
FAX: (408) 434-0507
●
LT 0306 • PRINTED IN USA
www.linear.com
©
LINEAR TECHNOLOGY CORPORATION 2006
