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Maxim Integrated Semiconductor Electronic Components Datasheet

MAX15002 Datasheet

Dual-Output Buck Controller

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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 0.85VIN
o Lossless Valley-Mode Current Sensing or
Accurate Valley Current Sensing Using RSENSE
o External Compensation for Maximum Flexibility
o Digital Soft-Start and Soft-Stop
o Sequencing or Coincident/Ratiometric VOUT
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
PART
TEMP RANGE PIN-PACKAGE
MAX15002ATL+
-40°C to +125°C
40 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Pin Configuration appears at end of data sheet.
PCI Express is a registered service mark of PCI-SIG Corp.
For pricing, delivery, and ordering information, please contact Maxim Direct
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.
19-3099; Rev 2; 10/12


Maxim Integrated Semiconductor Electronic Components Datasheet

MAX15002 Datasheet

Dual-Output Buck Controller

No Preview Available !

MAX15002
Dual-Output Buck Controller with
Tracking/Sequencing
ABSOLUTE MAXIMUM RATINGS
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 (VDREG_ + 0.3V)
DH_ to LX_ ...............................................-0.3V to (VBST_ + 0.3V)
PGND_ to SGND, PGND_ to Any Other PGND_.......-0.3V to +0.3V
Continuous Power Dissipation (TA = +70°C)
40-Pin TQFN (derate 37mW/°C above +70°C) .............2963mW*
Operating Junction Temperature Range ...........-40oC 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
*As per JEDEC51 standard (multilayer board).
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)
40 TQFN-EP
Junction-to-Ambient Thermal Resistance (θJA)...............27°C/W
Junction-to-Case Thermal Resistance (θJC)......................1°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
(VIN = 5.5V to 23V or VIN = VREG = 4.5V to 5.5V, VDREG_ = VREG, VPGND_ = VSYNC = VPHASE = VSEL = 0V, CREG = 2.2µF, RRT = 100k,
CCT = 0.1µF, RILIM_ = 60k, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at VIN = 12V, TA = TJ = +25°C.)
(Note 2)
PARAMETER
SYSTEM SPECIFICATIONS
Input-Voltage Range
Input Undervoltage Lockout
Threshold
SYMBOL
CONDITIONS
VIN
VUVLO
VIN = VREG = VDREG_ (Note 3)
VIN rising
MIN TYP MAX UNITS
5.5
23.0
V
4.5
5.5
V
3.95 4.05 4.15
V
Input Undervoltage Lockout
Hysteresis
0.35
V
Operating Supply Current
Shutdown Supply Current
REG VOLTAGE REGULATOR
VIN = 12V, VFB_ = 0.8V
VIN = 12V, VEN_ = 0V, PGOOD_ unconnected
Output-Voltage Setpoint
Load Regulation
VREG
DIGITAL SOFT-START/SOFT-STOP
VIN = 5.5V to 23V
IREG = 0 to 120mA, VIN = 12V
Soft-Start/Soft-Stop Duration
Reference Voltage Steps
ERROR TRANSCONDUCTANCE AMPLIFIER
FB_, TRACK_ Input Bias Current
FB_ Voltage Setpoint
VFB
TA = TJ = 0°C to +85°C
TA = TJ = -40°C to +125°C
FB_ to COMP_
Transconductance
COMP_ Output Swing
4.9
-250
0.593
0.590
0.75
4.3
150
2048
64
0.600
0.600
2.1
6.0
300
5.2
0.2
+250
0.605
0.608
3.50
mA
µA
V
V
Clocks
Steps
nA
V
V
mS
V
2
Maxim Integrated



Part Number MAX15002
Description Dual-Output Buck Controller
Maker Maxim Integrated
Total Page 3 Pages
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MAX15002 Datasheet PDF





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