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MAX15002ATL+T

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
MAX15002
Dual-Output Buck Controller with
Tracking/Sequencing
General Description
The MAX15002 is a dual-output, pulse-width-modulated
(PWM), step-down DC-DC controller with tracking and
sequencing options. The device operates over the input
voltage range of 5.5V to 23V or 5V ±10%. Each PWM
controller provides an adjustable output down to 0.6V and
delivers at least 15A of load current with excellent load
and line regulation. The MAX15002 is optimized for high-
performance, small-size power management solutions.
The options of Coincident Tracking, Ratiometric
Tracking, and Output Sequencing allow the tailoring of
the power-up/power-down sequence depending on the
system requirements. Each of the MAX15002 PWM sec-
tions utilizes a voltage-mode control scheme with exter-
nal compensation, allowing for good noise immunity
and maximum flexibility with a wide selection of induc-
tor values and capacitor types. Each PWM section
operates at the same, fixed switching frequency that is
programmable from 200kHz to 2.2MHz and can be syn-
chronized to an external clock signal using the SYNC
input. Each converter operating at up to 2.2MHz with
180° out-of-phase, increases the input capacitor ripple
frequency up to 4.4MHz, thereby significantly reducing
the RMS input ripple current and the size of the input
bypass capacitor requirement.
The MAX15002 includes internal undervoltage lockout
with hysteresis, digital soft-start/soft-stop for glitch-free
power-up and power-down of the converter. The power-
on reset (RESET) with an adjustable timeout period moni-
tors both outputs and provides a RESET signal to the
processor when both outputs are within regulation.
Protection features include lossless valley-mode current
limit and hiccup mode output short-circuit protection.
The MAX15002 is available in a space-saving, 6mm x
6mm, 40-pin TQFN-EP package and is specified for
operation over the -40°C to +125°C automotive temper-
ature range. See the MAX15003 data sheet for a triple
version of the MAX15002.
Applications
PCI Express
®
Host Bus Adapter Power Supplies
Networking/Server Power Supplies
Point-of-Load DC-DC Converters
Features
o 5.5V to 23V or 5V ±10% Input Voltage Range
o Dual-Output Synchronous Buck Controller
o Selectable In-Phase or 180° Out-of-Phase
Operation
o Output Voltages Adjustable from 0.6V to 0.85V
IN
o Lossless Valley-Mode Current Sensing or
Accurate Valley Current Sensing Using R
SENSE
o External Compensation for Maximum Flexibility
o Digital Soft-Start and Soft-Stop
o Sequencing or Coincident/Ratiometric V
OUT
Tracking
o Individual PGOOD Outputs
o RESET Output with a Programmable Timeout
Period
o 200kHz to 2.2MHz Programmable Switching
Frequency
o External Frequency Synchronization
o Hiccup Mode Short-Circuit Protection
o Space-Saving (6mm x 6mm) 40-Pin TQFN
Package
Ordering Information
19-3099; Rev 2; 10/12
PCI Express is a registered service mark of PCI-SIG Corp.
Pin Configuration appears at end of data sheet.
+
Denotes a lead(Pb)-free/RoHS-compliant package.
*
EP = Exposed pad.
PART TEMP RANGE PIN-PACKAGE
MAX15002ATL+ -40°C to +125°C 40 TQFN-EP*
MAX15002
Dual-Output Buck Controller with
Tracking/Sequencing
2
Maxim Integrated
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(V
IN
= 5.5V to 23V or V
IN
= V
REG
= 4.5V to 5.5V, V
DREG_
= V
REG
, V
PGND_
= V
SYNC
= V
PHASE
= V
SEL
= 0V, C
REG
= 2.2µF, R
RT
= 100kΩ,
C
CT
= 0.1µF, R
ILIM_
= 60kΩ, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at V
IN
= 12V, T
A
= T
J
= +25°C.)
(Note 2)
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.
IN, LX_, CSN_ to SGND..........................................-0.3V to +30V
BST_ to SGND ........................................................-0.3V to +30V
BST_ to LX_ ..............................................................-0.3V to +6V
REG, DREG_, SYNC, EN_, RT, CT,
RESET, PHASE, SEL to SGND ...............................-0.3V to +6V
ILIM_, PGOOD_, FB_, COMP_, CSP_ to SGND .......-0.3V to +6V
DL_ to PGND_.......................................-0.3V to (V
DREG_
+ 0.3V)
DH_ to LX_...............................................-0.3V to (V
BST_
+ 0.3V)
PGND_ to SGND, PGND_ to Any Other PGND_.......-0.3V to +0.3V
Continuous Power Dissipation (T
A
= +70°C)
40-Pin TQFN (derate 37mW/°C above +70°C) .............2963mW*
Operating Junction Temperature Range...........-40
o
C to +125°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range .............................-60°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
SYSTEM SPECIFICATIONS
5.5 23.0 V
Input-Voltage Range V
IN
V
IN
= V
REG
= V
DREG_
(Note 3) 4.5 5.5 V
Input Undervoltage Lockout
Threshold
V
UVLO
V
IN
rising 3.95 4.05 4.15 V
Input Undervoltage Lockout
Hysteresis
0.35 V
Operating Supply Current V
IN
= 12V, V
FB_
= 0.8V 4.3 6.0 mA
Shutdown Supply Current V
I N
= 12V , V
E N _
= 0V , P GO OD _ unconnected 150 300 µA
REG VOLTAGE REGULATOR
Output-Voltage Setpoint V
REG
V
IN
= 5.5V to 23V 4.9 5.2 V
Load Regulation I
REG
= 0 to 120mA, V
IN
= 12V 0.2 V
DIGITAL SOFT-START/SOFT-STOP
Soft-Start/Soft-Stop Duration 2048 Clocks
Reference Voltage Steps 64 Steps
ERROR TRANSCONDUCTANCE AMPLIFIER
FB_, TRACK_ Input Bias Current -250 +250 nA
T
A
= T
J
= 0°C to +85°C 0.593 0.600 0.605 V
FB_ Voltage Setpoint V
FB
T
A
= T
J
= -40°C to +125°C 0.590 0.600 0.608 V
FB_ to COMP_
Transconductance
2.1 mS
COMP_ Output Swing 0.75 3.50 V
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
.
PACKAGE THERMAL CHARACTERISTICS (Note 1)
40 TQFN-EP
Junction-to-Ambient Thermal Resistance (θ
JA
)...............27°C/W
Junction-to-Case Thermal Resistance (θ
JC
)......................1°C/W
*
As per JEDEC51 standard (multilayer board).
MAX15002
Dual-Output Buck Controller with
Tracking/Sequencing
3
Maxim Integrated
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Open-Loop Gain 80 dB
Unity-Gain Bandwidth 10 MHz
DRIVERS
DL_, DH_ Break-Before-Make
Time
C
LOAD
= 5nF 20 ns
Low, sinking 100mA 0.9
DH1 On-Resistance
High, sourcing 100mA
1.3
Ω
Low, sinking 100mA 0.9
DH2 On-Resistance
High, sourcing 100mA 1.3
Ω
Low, sinking 100mA 0.9
DL1 On-Resistance
High, sourcing 100mA
1.3
Ω
Low, sinking 100mA 0.9
DL2 On-Resistance
High, sourcing 100mA 1.3
Ω
LX_ to PGND_ On-Resistance Sinking 10mA 8 Ω
CURRENT-LIMIT AND HICCUP MODE
Cycle-By-Cycle Valley Current-
Limit Adjustment Range
V
CL
V
CL_
= V
ILIM_
/10 50 300 mV
V
ILIM_
= 0.5V 44 54
Cycle-By-Cycle Valley Current-
Limit Threshold Tolerance
V
ILIM_
= 3V 288 312
mV
ILIM_ Reference Current V
ILIM_
= 0 to 3V, T
A
= T
J
= +25°C 20 µA
ILIM_ Reference Current
Temperature Coefficient
3333 ppm/°C
CSP_, CSN_ Input Bias Current V
CSP_
= 0V, V
CSN_
= -0.3V -20 +20 µA
Number of Cumulative Current-
Limit Events to Hiccup
N
CL
8
Number of Consecutive Non-
Current-Limit Cycles to Clear N
CL
N
CLR
3
Hiccup Timeout 4096
Clock
periods
ENABLE/PHASE/SEL
EN1 Threshold V
EN-TH
EN1 rising 1.19 1.215 1.24 V
EN1 Threshold Hysteresis 0.12 V
EN1 Input Bias Current -1 +1 µA
PHASE Input High 2V
PHASE Input Low 0.8 V
PHASE Input Bias Current -1 +1 µA
SEL Threshold 20 %V
REG
SEL Input Bias Current -1 +1 µA
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= 5.5V to 23V or V
IN
= V
REG
= 4.5V to 5.5V, V
DREG_
= V
REG
, V
PGND_
= V
SYNC
= V
PHASE
= V
SEL
= 0V, C
REG
= 2.2µF, R
RT
= 100kΩ,
C
CT
= 0.1µF, R
ILIM_
= 60kΩ, T
A
= T
J
= -40°C to +125°C, unless otherwise noted. Typical values are at V
IN
= 12V, T
A
= T
J
= +25°C.)
(Note 2)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P29

MAX15002ATL+T

Mfr. #:
Buy MAX15002ATL+T
Manufacturer:
Maxim Integrated
Description:
Switching Controllers Dual-Out Buck Ctlr w/Track/Sequence
Lifecycle:
New from this manufacturer.
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