Product Summary

The L5973AD is a step down monolithic power switching regulator with a switch current limit of 2 A so it is able to deliver more than 1.5 A DC current to the load depending on the application conditions. The output voltage can be set from 1.235 V to 35 V. The high current level is also achieved thanks to an SO8 package with exposed frame, that allows to reduce the RthJA down to approximately 40 ℃/W.

Parametrics

L5973AD absolute maximum ratings: (1)Input voltage: 40 V; (2)Output DC voltage: -1 to 40V; (3)Output peak voltage at t = 0.1 μs: -5 to 40V; (4)Maximum output current int. limit.; (5)V4, V5 Analog pins: 4 V; (6)V3 INH: -0.3V to VCC; (7)V2 SYNC: -0.3 to 4 V; (8)PTOT Power dissipation at TA ≤ 60 ℃: 2.25 W; (9)TJ Operating junction temperature range: -40 to 150 ℃; (10)TSTG Storage temperature range: -55 to 150 ℃.

Features

L5973AD features: (1)2A internal switch; (2)Operating input voltage from 4.4V TO 36V; (3)3.3V / (±2%) reference voltage; (4)Output voltage adjustable from 1.235V TO 35V; (5)Low dropout operation: 100% duty cycle; (6)500KHz internally fixed frequency; (7)Voltage feedforward; (8)Zero load current operation; (9)Internal current limiting; (10)Inhibit for zero current consumption; (11)Synchronization; (12)Protection against feedback disconnection; (13)Thermal shutdown.

Diagrams

L5973AD Test application circuit

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
L5973AD
L5973AD
STMicroelectronics
Switching Converters, Regulators & Controllers 1.235 to 35V Step-Dn
Data Sheet
0-1: $1.51
1-10: $1.27
10-100: $1.15
100-250: $1.04
L5973ADTR
L5973ADTR
STMicroelectronics
Switching Converters, Regulators & Controllers 1.235 to 35V Step-Dn
Data Sheet
0-1: $1.51
1-25: $1.39
25-100: $1.32
100-250: $1.15