Product Summary

The L5973ADTR is a step down monolithic power switching regulator with a switch current limit of 2A so the L5973ADTR is able to deliver more than 1.5A 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 of the L5973ADTR 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 L5973ADTR uses an internal P-Channel D-MOS transistor (with a typical of 200mΩ) as switching element to avoid the use of bootstrap capacitor and guarantee high efficiency. The applications of the L5973ADTR 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

L5973ADTR absolute maximum ratings: (1)V8, Input Voltage: 40 V; (2)V1, Output DC voltage: -1 to 40 V; (3)I1, Maximum output current: int. limit.; (4)V4, V5, Analog pins: 4 V; (5)V3, INH: -0.3V to VCC; (6)V2, SYNC: -0.3 to 4 V; (7)Ptot, Power dissipation at Tamb ≤ 60 ℃: 2.25 W; (8)Tj, Operating junction temperature range: -40 to 150 ℃; (9)Tstg, Storage temperature range: -55 to 150 ℃.

Features

L5973ADTR 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

L5973ADTR block diagram

Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
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
Image Part No Mfg Description Data Sheet Download Pricing
(USD)		 Quantity
L5970AD
L5970AD
STMicroelectronics
Switching Converters, Regulators & Controllers 4.4-36V 1A Step-Down
Data Sheet
0-1610: $0.84
1610-2000: $0.83
L5970ADTR
L5970ADTR
STMicroelectronics
Switching Converters, Regulators & Controllers STEP DOWN MONOLITHIC SWITCH REG 1.5A
Data Sheet
0-2020: $0.84
2020-2500: $0.83
L5970D
L5970D
STMicroelectronics
Switching Converters, Regulators & Controllers 1.2 to 35V Step-Down
Data Sheet
0-1: $1.57
1-10: $1.48
10-100: $1.37
100-250: $1.19
L5970D013TR
L5970D013TR
STMicroelectronics
Switching Converters, Regulators & Controllers 1.2 to 35V Step-Down
Data Sheet
0-1: $1.51
1-25: $1.39
25-100: $1.26
100-250: $1.15
L5971
L5971
STMicroelectronics
Switching Converters, Regulators & Controllers 1.26 to 20V Step-Dwn
Data Sheet
Negotiable 
L5971D
L5971D
STMicroelectronics
Switching Converters, Regulators & Controllers 1.26 to 20V Step-Dwn
Data Sheet
Negotiable