MAX15002_12 Datasheet, PDF (1/29 Pages) Maxim Integrated Products – Dual-Output Buck Controller with Tracking/Sequencing

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
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