MAX17501_13 Datasheet, PDF (11/22 Pages) Maxim Integrated Products – 60V, 500mA, Ultra-Small, High-Efficiency, Synchronous Step-Down DC-DC Converter

MAX17501
60V, 500mA, Ultra-Small, High-Efficiency,
Synchronous Step-Down DC-DC Converter
Pin Configuration
TOP VIEW
MAX17501
PGND 1
+
VIN 2
10 LX
9 GND
EN/UVLO 3
8 RESET
V_CC 4
FB/VO 5
EP*
7 N.C./COMP
6 SS
TDFN
(3mm x 2mm)
*EP = EXPOSED PAD. CONNECT TO GND
Pin Description
PIN
NAME
FUNCTION
1
PGND
Power Ground. Connect PGND externally to the power ground plane. Connect GND and PGND pins
together at the ground return path of the V_CC bypass capacitor.
2
V_IN
Power-Supply Input. The input supply range is from 4.5V to 60V.
Enable/Undervoltage Lockout Input. Drive EN/UVLO high to enable the output voltage. Connect to the
3
EN/UVLO center of the resistive divider between V_IN and GND to set the input voltage (undervoltage threshold) at
which the device turns on. Pull up to V_IN for always on.
4
V_CC
5V LDO Output. Bypass V_CC with 1µF ceramic capacitance to GND.
5
FB/VO
Feedback Input. For fixed output voltage devices, directly connect FB/VO to the output. For adjustable
output voltage devices, connect FB/VO to the center of the resistive divider between V_OUT and GND.
6
SS
Soft-Start Input. Connect a capacitor from SS to GND to set the soft-start time.
7
N.C./COMP
For fixed output voltage devices, leave this pin unconnected. For adjustable output voltage devices,
connect an RC network from COMP to GND.
Open-Drain RESET Output. The RESET output is driven low if FB drops below 92.5% of its set value.
8
RESET _{RESET goes high 1024 clock cycles after FB rises above 95.5% of its set value. RESET is valid when}
the device is enabled and V_IN is above 4.5V.
9
GND
Analog Ground
10
LX
Switching Node. Connect LX to the switching side of the inductor. LX is high impedance when the device
is in shutdown mode.
—
EP
Exposed Pad. Connect to the GND pin of the IC. Connect to a large copper plane below the IC to improve
heat dissipation capability.
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