Datasheet ADP2360 (Analog Devices)

50 mA, 60 V, High Efficiency Buck Regulator Data Sheet ADP2360 FEATURES TYPICAL APPLICATION CIRCUIT Input voltage supply range: 4.5 V to 60 V ADP2360 Adjustable output voltage range: 0.8 V to V L1 IN VIN 8 VIN SW 7 VOUT Factory-programmable fixed output voltage options of CIN 3.3 V and 5.0 V RPG FB 4 COUT Continuous output current up to 50 mA PG 2 PG Adjustable peak inductor current limit up to 140 mA ON EN Pulse frequency modulation (PFM) control OFF 1 ITH 3 R Very high efficiency 5 SS ITH AGND 90% at V C IN = 9 V, VOUT = 3.3 V, IOUT = 10 mA SS PGND (EPAD) 87% at V 6 9 IN = 9 V, VOUT = 3.3 V, IOUT = 1 mA
001
Low shutdown current: <4 μA
13944-
Low quiescent current: 12 μA typical in sleep mode
Figure 1.
100% duty cycle operation 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- the ADP2360 to optimize the efficiency for the application operat- ous conduction mode (DCM) synchronous, step-down, dc-to-dc ing conditions and minimize the compatible inductor size. switching regulator. The ADP2360 operates with a wide input The ADP2360 further offers a power-good (PG) pin to indicate voltage supply range from 4.5 V to 60 V and can source up to when the output voltage is good. Other key features include 100% 50 mA continuous output current, making it ideal for regulating duty cycle operation, precision enable control, external soft start power from a variety of voltage sources in space-constrained control, UVLO, and TSD protection. applications. The ADP2360 is available with an adjustable output (0.8 V to V The ADP2360 requires no external compensation and the solution IN) or in 3.3 V and 5.0 V factory-programmable fixed output voltage models. for the fixed output voltage options requires a minimum of three external components. The ADP2360 is available in a 3 mm × 3 mm, The ADP2360 uses a single-pulse PFM architecture with an 8-lead LFCSP package with an operating junction temperature adjustable peak current level (IPEAK) control to minimize the range from −40°C to +125°C. input and output ripple. The adjustable IPEAK current limit allows
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Document Outline FEATURES APPLICATIONS TYPICAL APPLICATION CIRCUIT GENERAL DESCRIPTION REVISION HISTORY SPECIFICATIONS ABSOLUTE MAXIMUM RATINGS THERMAL RESISTANCE ESD CAUTION PIN CONFIGURATION AND FUNCTION DESCRIPTIONS TYPICAL PERFORMANCE CHARACTERISTICS THEORY OF OPERATION OVERVIEW CONTROL SCHEME 100% Duty Cycle Adjustable Peak Current Threshold (ITH) DEVICE FEATURES Fixed and Adjustable Output Models Shutdown/Precision Enable Soft Start Thermal Shutdown (TSD) Undervoltage Lockout (UVLO) Power Good APPLICATIONS INFORMATION SETTING THE OUTPUT VOLTAGE INPUT CAPACITOR SELECTION ESTIMATING THE SWITCHING FREQUENCY SETTING THE PEAK INDUCTOR CURRENT INDUCTOR SELECTION OUTPUT CAPACITOR SELECTION DESIGN OPTIMIZATION RECOMMENDED COMPONENTS PCB LAYOUT CONSIDERATIONS OUTLINE DIMENSIONS ORDERING GUIDE