Product Summary

The L5973D is a step down monolithic power switching regulator with a minimum switch current limit of 2.5A so it is able to deliver more than 2A DC current to the load depending on the application conditions. The output voltage can be set from 1.235V to 35V. 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 250mW) 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, industrial: chargers, car battery DC-DC converters.

Parametrics

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

Features

L5973D features: (1)2.5A 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)250khz 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