MAX17509 Datasheet, PDF (1/24 Pages) Maxim Integrated Products – External Frequency Synchronization

MAX17509
EVALUATION KIT AVAILABLE
4.5V–16V, Dual 3A, High-Efficiency, Synchronous Step-Down
DC-DC Converter with Resistor Programmability
General Description
The MAX17509 integrates two 3A internal switch step-down
regulators with programmable features. The device can
be configured as two single-phase independent, 3A power
supplies or as a dual-phase, single-output 6A power
supply. The device operates from 4.5V to 16V input and
generates independently adjustable output voltage in the
ranges of 0.904V to 3.782V and 4.756V to 5.048V, with
±2% system accuracy.
This device provides maximum flexibility to the end-user
by allowing to choose multiple programmable options by
connecting resistors to the configuration pins. Two key
highlights of the device are the self-configured compen-
sation for any output voltage and the ability to program
the slew rate of LX switching nodes to mitigate noise
concerns. In noise-sensitive applications, such as high-
speed multi-gigabit transceivers in FPGAs, RF, and audio
benefit from this unique slew rate control. SYNC input is
provided for synchronized operation of multiple devices
with system clocks.
MAX17509 offers output overvoltage (OV) and
undervoltage (UV) protection, as well as overcurrent
(OC) and undercurrent (UC) protection with a selectable
hiccup/latch option. It operates over the -40°C to +125°C
temperature range, with thermal sensing and shutdown
provided for overtemperature (OT) protection. The device
is available in a 32-pin 5mm x 5mm TQFN package.
Applications
●● FPGA and DSP Core Power
●● Industrial Control Equipment
●● Multiple Point-of-Load (POL) Power Supplies
●● Base Station Point-of-Load Regulator
Ordering Information appears at end of data sheet.
Features and Benefits
●● Reduces Number of DC-DC Regulators in Inventory
• Output Voltage (0.904V to 3.782V and 4.756V to
5.048V with 20mV Resolution)
• Configurable Two Independent Outputs (3A/3A) or
a Dual-Phase Single Output (6A)
●● Mitigate Noise Concerns and EMI
• Adjustable Switching Frequency with Selectable
0/180° Phase Shift
• External Frequency Synchronization
• Adjustable Switching Slew Rate
• Passes EN55022 (CISPR22) Class-B Radiated
and Conducted EMI Standard
●● Ease of System Design
• All Ceramic Capacitors Solution
• Auto-Configured Internal Compensation
• Selectable Hiccup or Brickwall Mode
• Adjustable Soft-Start Rise/Fall Time with Soft Stop
Modes and Prebias Startup
• -40°C to +125°C Operation
●● Reliable Operation
• Robust Fault Protections (VIN_UVLO, UV/OV, UC/
OC, OT)
• Power Good
Application Circuit
MAX17509
CVCC
PGOOD1, 2
SYNC
VCC
CAVCC
AVCC
RCOARSE1
COARSE1
RFINE1
FINE1
RSS1
SS1
RCOARSE2
COARSE2
RFINE2
FINE2
RSS2
SS2
RMODE
MODE
EN1, 2
AVCC
IN1
BST1
CBST1
LX1
OUT1
PGND1
IN2
BST2
CBST2
LX2
OUT2
PGND2
VIN
CIN1
L1
VOUT1
COUT1
VIN
CIN2
L2
VOUT2
COUT2
SGND EP
19-7051; Rev 0; 2/15