EVALUATION KIT AVAILABLE
MAX15301
InTune Automatically Compensated Digital PoL
Controller with Driver and PMBus Telemetry
General Description
The MAX15301 is a full-featured, highly efficient, digital
point-of-load (PoL) controller with advanced power man-
agement and telemetry features. Unlike PID-based digital
power regulators, the MAX15301 uses Maxim’s patented
InTune™ automatically compensated, state-space control
algorithm. The InTune control law is valid for both the
small- and large-signal response and accounts for duty-
cycle saturation effects. These capabilities result in fast
loop transient response and reduce the number of output
capacitors compared to competing digital controllers.
The MAX15301 includes multiple features to optimize
efficiency. An internal switch BabyBuck™ regulator gen-
erates the gate drive and the internal bias supplies for
the controller with low power loss. An advanced, high-
efficiency MOSFET gate driver has adjustable nonoverlap
timing and load-variable gate-drive voltage to minimize
switching losses over the full range of voltage, current,
and temperature.
The MAX15301 was designed for end-customer’s design
environment. An on-board PMBus™-compliant serial bus
interface enables communication with a supervisory con-
troller for monitoring and fault management. A full suite
of power management features eliminates the need for
complicated and expensive sequencing and monitoring
ICs. Basic DC-DC conversion operation can be set up
via pin strapping and does not require user configura-
tion firmware. This allows for rapid development of the
power-supply subsystem before board-level systems
engineering is completed. Maxim provides support hard-
ware and software for configuring the MAX15301.
The MAX15301 is available in a 32-lead, 5mm x 5mm
TQFN package and operates over the -40°C to +85°C
temperature range.
Features
●
InTune Automatic Compensation Ensures Stability
While Optimizing Transient Performance
●
State-Space Compensation Results in Fast Transient
Response with Reduced Output Capacitance
●
Differential Remote Voltage Sensing Enables ±1%
V
OUT
Accuracy over Temperature (-40°C to +85°C)
●
PMBus Interface for Configuration, Control, and
Monitoring
●
Supports Voltage Positioning
●
High Output 2A/4A MOSFET Driver
• Adjustable Nonoverlap Timing
• Variable Gate-Drive Voltage
●
Wide Input Range of 4.5V to 14V
●
Efficient On-Chip BabyBuck Regulator for Self-Bias
●
Output Voltage Range from 0.5V to 5.25V
●
Startup into a Prebiased Output
●
Configurable Soft-Start and Soft-Stop Time
●
Fixed-Frequency Operation and Synchronization
●
Flexible Sequencing and Fault Management
●
Pin-Strappable Configuration
• Output Voltage, SMBus Address, Switching
Frequency, Current Limit
●
Out-of-the-Box Operation Enables Fast Prototyping
Applications
●
●
●
●
●
Servers
Storage Systems
Routers/Switches
Base-Station Equipment
Power Modules
InTune and BabyBuck are trademarks of Maxim Integrated
Products, Inc.
PMBus is a trademark of SMIF, Inc.
Maxim patents apply: 7498781, 7880454, 7696736, 7746048,
7466254, 798613, 7498781, 8,120,401, 8,014,879.
This product is subject to a license from Power-One, Inc., relat-
ed to digital power technology patents owned by Power-One,
Inc. This license does not extend to merchant market stand-
alone power-supply products.
Ordering Information
and
Typical Operating Circuit
appear
at end of data sheet.
For related parts and recommended products to use with this part, refer
to
www.maximintegrated.com/MAX15301.related.
19-6267; Rev 4; 11/13
MAX15301
InTune Automatically Compensated Digital PoL
Controller with Driver and PMBus Telemetry
Absolute Maximum Ratings
INSNS to SGND ....................................................-0.3V to +14V
LXSNS to SGND ......................................................-2V to +14V
LXSNS (pulse < 10ns) to SGND ..............................-2V to +20V
OUTP, OUTN, DCRP, DCRN to SGND ................-0.3V to +5.5V
PWR to PGND.......................................................-0.3V to +18V
HLD to SGND ..........................................................-0.3V to +4V
3P3 to SGND................................. -0.3V to the minimum of +4V
or (V
GDRV
+ 0.3V)
GDRV to SGND........................... -0.3V to the minimum of +12V
or (V
PWR
+ 0.3V)
LX to PGND........-2V to the minimum of +26V or (V
BST
+ 0.3V)
DL to PGND ......................................... -0.3V to (V
GDRV
+ 0.3V)
LBI to PGND........................................... -0.3V to (V
PWR
+ 0.3V)
LBO to PGND ...........................(V
3P3
- 0.3V) to (V
GDRV
+ 0.3V)
DH to PGND ................................. (V
LX
- 0.3V) to (V
BST
+ 0.3V)
BST to LX ..............................................................-0.3V to +12V
BST to PGND ........................................................-0.3V to +26V
BST to GDRV ........................................................-0.3V to +26V
1P8 to DGND .......................................................-0.3V to +2.2V
CIO, SET, PG, ADDR0, ADDR1, SYNC, TEMPX,
SALRT
to DGND… ..............................................-0.3V to +4V
EN, SCL, SDA to DGND .........................................-0.3V to +4V
PGND to SGND....................................................-0.3V to +0.3V
DGND to SGND ...................................................-0.3V to +0.3V
Electrostatic Discharge (ESD) Rating
Human Body Model (HBM) .........................................±3500V
Machine Model ..............................................................±200V
Junction Temperature ......................................................+125°C
Operating Temperature Range ........................... -40°C to +85°C
Continuous Power Dissipation (T
A
= +70°C)
TQFN (derate 34.5mW/°C above +70°C)..................2758mW
Storage Temperature Range ............................ -65°C to +150°C
Lead Temperature (soldering, 10s) ................................. +300°C
Soldering Temperature (reflow) .......................................+260°C
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these
or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect
device reliability.
Package Thermal Characteristics
(Note 1)
TQFN
Junction-to-Ambient Thermal Resistance (θ
JA
) ..........29°C/W
Junction-to-Case Thermal Resistance (θ
JC
) ..................1.7°C/W
Note 1:
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to
www.maximintegrated.com/thermal-tutorial.
Electrical Characteristics
(All settings = factory default, V
PWR
= V
INSNS
= 12V, V
SGND
= V
DGND
= V
PGND
= 0V, V
OUT
= 1.2V, f
SW
= 600kHz. Specifications are
for T
A
= T
J
= -40°C to +85°C, typical values are at T
A
= T
J
= +25°C. See the
Typical Operating Circuit,
unless otherwise noted.)(Note 2)
PARAMETER
INPUT SUPPLY
Input Voltage Range
V
PWR
I
PWR
BabyBuck bias supply, driver not
switching
Linear mode bias supply, driver not
switching
Input rising
Rising edge
Hysteresis
I
LOAD(3P3)
= 0mA
I
LOAD(1P8)
= 0mA
14.3
3.8
4.5
10
mA
24
15.2
4.1
0.24
3.3
1.80
50
16.0
4.4
V
V
14
V
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Input Supply Current
Input Overvoltage Lockout
Threshold
Input Undervoltage Lockout
Threshold
BIAS REGULATORS
3P3 Output Voltage
1P8 Output Voltage
V
OVLO(PWR)
V
UVLO(PWR)
V
3P3
V
1P8
V
V
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Maxim Integrated
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2
MAX15301
InTune Automatically Compensated Digital PoL
Controller with Driver and PMBus Telemetry
Electrical Characteristics (continued)
(All settings = factory default, V
PWR
= V
INSNS
= 12V, V
SGND
= V
DGND
= V
PGND
= 0V, V
OUT
= 1.2V, f
SW
= 600kHz. Specifications are
for T
A
= T
J
= -40°C to +85°C, typical values are at T
A
= T
J
= +25°C. See the
Typical Operating Circuit,
unless otherwise noted.)(Note 2)
PARAMETER
STARTUP/SHUTDOWN TIMING
Firmware Initialization
Minimum t
ON_DELAY
Turn-On Rise Time
Adaptive Tuning Time
OUTPUT VOLTAGE
Output Voltage Range
LX Bias Current
Duty-Cycle Range
Regulation Set-Point
Accuracy
V
OUT
Sense Bias Current
DCR Sense Bias Current
PWM CLOCK (Note 4)
Switching Frequency Range
Switching Frequency Set-
Point Accuracy
External Clock to SYNC
Frequency Range
External Clock to SYNC Duty
Cycle
SYNC Frequency Drift
Tolerance
PROTECTION (Note 4)
Current-Sense Common-
Mode Voltage
Overcurrent Fault Threshold
Accuracy
Output Overvoltage Fault
Threshold
Output Undervoltage Fault
Threshold
f
SYNC
D
EXTCLK
From nominal lock frequency (Note 6)
f
SW
T
A
= +25°C
300
-5
-10
300
40
-10
1000
+5
+10
1000
60
+10
kHz
%
kHz
%
%
I
OUTP
I
OUTN
I
DCRP
I
DCRN
V
OUT
I
LX
Measured from OUTP to OUTN
(Notes 4 and 5)
Not switching, current out of device pin
(Notes 3 and 4)
T
A
= +25°C, I
OUT
≤ 20A (Notes 4, 8, 9)
-40°C ≤ T
A
≤ +85°C (Notes 4, 8, 9)
Current flowing into OUTP
Current flowing out of OUTN
Current flowing into DCR,
V
DCRP
- V
DCRN
= 150mV
5
-0.5
-1
50
35
120
4
0.5
200
95
+0.5
+1
5.25
V
µA
%
%
µA
µA
nA
µA
t
1
t
2
t3
t
4
From V
IN
> V
UVLO(PWR)
, until ready to
enable (Figure 2)
(Figure 2, Note 4)
(Figure 2, Note 4)
From V
OUT
= V
OUT
command to assertion
of power good (PG) (Figure 2)
1
1
12
25
ms
ms
ms
ms
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
V
ISP
, V
ISN
T
A
= +25°C, exclusive of sensor error
Output rising
Output falling
-0.1
±3
115
85
+5.5
V
%
V
OUT
%
V
OUT
%
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Maxim Integrated
│
3
MAX15301
InTune Automatically Compensated Digital PoL
Controller with Driver and PMBus Telemetry
Electrical Characteristics (continued)
(All settings = factory default, V
PWR
= V
INSNS
= 12V, V
SGND
= V
DGND
= V
PGND
= 0V, V
OUT
= 1.2V, f
SW
= 600kHz. Specifications are
for T
A
= T
J
= -40°C to +85°C, typical values are at T
A
= T
J
= +25°C. See the
Typical Operating Circuit,
unless otherwise noted.)(Note 2)
PARAMETER
Thermal Shutdown Threshold
Accuracy
Thermal Shutdown
Hysteresis
Power-Good Threshold
POWER MANAGEMENT (Note 4)
STARTUP/SHUTDOWN TIMING
Firmware Initialization
TON_DELAY, TOFF_DELAY
Range
TON_DELAY, TOFF DELAY
Resolution
TON_DELAY, TOFF DELAY
Command Accuracy
TON_DELAY, TOFF DELAY
Timing Accuracy
TON_RISE, TOFF_FALL
Range
TON_RISE, TOFF_FALL
Resolution
TON_RISE, TOFF_FALL
Command Accuracy
TON_RISE, TOFF_FALL
Timing Accuracy
Adaptive Tuning Time
t
4
t
3
t
RR
t
1
t
2
From V
IN
> V
UVLO(PWR)
, until ready to
enable (Figure 2)
Minimum delay (Figure 2, Note 4)
Maximum delay (Figure 2, Note 4)
Delay timing step size
Command value sent vs. readback
Command readback value vs. actual delay
time
Minimum (Figure 2, Note 4)
Maximum (Figure 2, Note 4)
Ramp timing step size (varies with VOUT_
COMMAND)
Command value sent vs. readback
Command readback value vs. actual ramp
duration
From end of soft-start ramp to PG assertion
(varies with FREQUENCY_SWITCH
(Figure 2)
200mV < V
IN
< (V
OUT_SET
- 200mV)
(Note 7)
External
Internal
Open-drain output mode, open-drain
connected to 5.5V, V
3P3
= 3.3V
CMOS mode, I
SOURCE
= 4mA
V
3P3
- 0.4
-100
±5
±5
±10
12
±0.8
1
255 x t
RR
0.4 -1.0
±0.5
25
1
145
0.6
±0.3
ms
ms
ms
ms
ms
ms
ms
ms
µs
ms
V
OUT
rising
V
OUT
falling
SYMBOL
CONDITIONS
MIN
TYP
±20
20
90
85
MAX
UNITS
°C
°C
%
V
OUT
Tracking Error
Temperature Measurement
Accuracy
DIGITAL I/O
Power-Good Logic-High
Leakage Current
Output Logic-High
+100
°C
10
V
3P3
µA
V
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Maxim Integrated
│
4
MAX15301
InTune Automatically Compensated Digital PoL
Controller with Driver and PMBus Telemetry
Electrical Characteristics (continued)
(All settings = factory default, V
PWR
= V
INSNS
= 12V, V
SGND
= V
DGND
= V
PGND
= 0V, V
OUT
= 1.2V, f
SW
= 600kHz. Specifications are
for T
A
= T
J
= -40°C to +85°C, typical values are at T
A
= T
J
= +25°C. See the
Typical Operating Circuit,
unless otherwise noted.)(Note 2)
PARAMETER
Output Logic-Low
Input Bias Current
Rise/Fall Slew Rate
EN, SYNC Input-Logic Low
Voltage
EN, SYNC Input-Logic High
Voltage
EN, SYNC Input Leakage
Current
SMBus (Note 4)
SDA, SCL Input Logic-Low
Voltage
SDA, SCL Input Logic-High
Voltage
SDA, SCL, SALRT Logic-
High Leakage Current
SDA, SCL, SALRT Logic-Low
Output Voltage
PMBus Operating Frequency
Bus Free Time
(STOP - START)
START Condition Hold Time
from SCL
START Condition Setup Time
from SCL
STOP Condition Setup Time
from SCL
SDA Hold Time from SCL
SDA Setup Time from SCL
SCL Low Period
SCL High Period
DRIVER BIAS REGULATOR
GDRV Output Voltage Range
GDRV Undervoltage Lockout
LBI, LBO Current Limit
V
GDRV
V
GDRVUVLO
GCTRLDAC = 0
GCTRLDAC = 15
GDRV falling, 200mV (typ) hysteresis
3.5
5.2
8.7
3.75
0.7
V
V
A
f
SMB
t
BUF
t
HD:STA
t
SU:STA
t
SU:STO
t
HD:DAT
t
SU:DAT
t
LOW
t
HIGH
1.3
0.6
0.6
0.6
300
100
1.3
0.6
Input voltage falling
Input voltage rising
V
SCL
, V
SDA
= 0V, and V
SALRT
tested at
0V and 3.3V
I
SINK
= 4mA
400
2
10
0.4
0.8
V
V
µA
V
kHz
µs
µs
µs
µs
ns
ns
µs
µs
C
LOAD
= 15pF
Input voltage falling
Input voltage rising
2
-10
+10
SYMBOL
I
SINK
= 4mA
-1
2
0.8
CONDITIONS
MIN
TYP
0.4
+1
MAX
V
µA
ns
V
V
µA
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5
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