Product Summary

The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5 A so it is able to deliver more than 2 A DC current to the load depending on the application conditions. The output voltage of the L5973D 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 Rth(j-amb) down to approximately 40 ℃/W. The L5973D uses an internal P-channel D-MOS transistor (with a typical Rdson of 250 mΩ) as switching element to minimize the size of the external components. The applications of the L5973D include Consumer: STB, DVD, TV, VCR, car radio, LCD monitors, Networking: XDSL, modems, DC-DC modules, Computer: printers, audio/graphic cards, optical storage, hard disk drive and Industrial: changers, car battery, DC-DC converters.

Parametrics

L5973D absolute maximum ratings: (1)V8, Input voltage: 40 V; (2)V1, Output DC voltage: -1 to 40V; Output peak voltage at t = 0.1 μs: -5 to 40V; (3)I1, Maximum output current: int. limit; (4)V4, V5, Analog pins: 4 V; (5)V3, INH: -0.3 V to VCC; (6)V2, SYNC: -0.3 to 4 V; (7)PTOT, Power dissipation at TA ≤ 60℃: 2.25 W; (8)TJ, Operating junction temperature range: -40 to 150℃; (9)TSTG, Storage temperature range: -55 to 150℃.

Features

L5973D features: (1)2.5 A internal switch; (2)Operating input voltage from 4 V to 36 V; (3)3.3 V / (±2%) reference voltage; (4)Output voltage adjustable from 1.235 V to 35 V; (5)Low dropout operation: 100% duty cycle; (6)250 kHz 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

L5973D circuit diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
L5973D013TR
L5973D013TR
STMicroelectronics
Switching Converters, Regulators & Controllers 2.5 A Step-DN Switching Reg
Data Sheet
0-1: $1.90
1-25: $1.67
25-100: $1.40
100-250: $1.36
L5973D
L5973D
STMicroelectronics
Switching Converters, Regulators & Controllers 1.235 to 35V Step-Dn
Data Sheet
0-1: $1.15
1-10: $1.09
10-100: $1.00
100-250: $0.97