50 mA, 60 V,
High Efficiency Buck Regulator
ADP2360
Data Sheet
FEATURES
TYPICAL APPLICATION CIRCUIT
Input voltage supply range: 4.5 V to 60 V
Adjustable output voltage range: 0.8 V to VIN
Factory-programmable fixed output voltage options of
3.3 V and 5.0 V
Continuous output current up to 50 mA
Adjustable peak inductor current limit up to 140 mA
Pulse frequency modulation (PFM) control
Very high efficiency
90% at VIN = 9 V, VOUT = 3.3 V, IOUT = 10 mA
87% at VIN = 9 V, VOUT = 3.3 V, IOUT = 1 mA
Low shutdown current: <4 µA
Low quiescent current: 12 µA typical in sleep mode
100% duty cycle operation
ADP2360
L1
V
8
VIN
IN
7
4
V
OUT
SW
FB
C
IN
R
PG
C
OUT
PG
PG
2
1
5
ON
EN
SS
3
OFF
ITH
R
ITH
AGND
(EPAD)
9
C
SS
PGND
6
Figure 1.
Undervoltage lockout (UVLO)
No external compensation required
Enable input with precision thresholds
Programmable soft start
Power-good output
Thermal shutdown (TSD) protection
8-lead LFCSP package
APPLICATIONS
4 mA to 20 mA loop powered systems
HART modems
Building automation
Distributed power systems
Industrial control supplies
Other high VIN, low IOUT systems
GENERAL DESCRIPTION
The ADP2360 is a high efficiency, high input voltage, discontinu-
ous conduction mode (DCM) synchronous, step-down, dc-to-dc
switching regulator. The ADP2360 operates with a wide input
voltage supply range from 4.5 V to 60 V and can source up to
50 mA continuous output current, making it ideal for regulating
power from a variety of voltage sources in space-constrained
applications. The ADP2360 is available with an adjustable output
(0.8 V to VIN) or in 3.3 V and 5.0 V factory-programmable fixed
output voltage models.
the ADP2360 to optimize the efficiency for the application operat-
ing conditions and minimize the compatible inductor size.
The ADP2360 further offers a power-good (PG) pin to indicate
when the output voltage is good. Other key features include 100%
duty cycle operation, precision enable control, external soft start
control, UVLO, and TSD protection.
The ADP2360 requires no external compensation and the solution
for the fixed output voltage options requires a minimum of three
external components. The ADP2360 is available in a 3 mm × 3 mm,
8-lead LFCSP package with an operating junction temperature
range from −40°C to +125°C.
The ADP2360 uses a single-pulse PFM architecture with an
adjustable peak current level (IPEAK) control to minimize the
input and output ripple. The adjustable IPEAK current limit allows
Rev. 0
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