L5973D STMicroelectronics, L5973D Datasheet - Page 3

• Manufacturer Part Number: L5973D
• Description: IC REG SWITCHING STEPDOWN SOIC-8
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L5973D

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 1.24 ~ 35 V
• Current - Output: 2.5A
• Frequency - Switching: 250kHz
• Voltage - Input: 4 ~ 36 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width) Exposed Pad, 8-eSOIC. 8-HSOIC
• Power - Output: 2.25W
• Output Voltage: 35 V
• Output Current: 2.5 A
• Input Voltage: 4 V to 36 V
• Switching Frequency: 212 KHz to 280 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: SMD/SMT
• Duty Cycle (max): 100 %
• Current, Input Bias: 2.5 μA
• Current, Output: 300 μA
• Current, Supply: 2.5 mA
• Frequency, Oscillator: 250 kHz
• Package Type: HSOP-8
• Power Dissipation: 2.25 W
• Regulation, Line: 5 mV
• Regulation, Load: 8 mV
• Regulator Type: Low Dropout, Switching
• Temperature, Operating, Range: -40 to +150 °C
• Transconductance: 2.3
• Voltage, Gain: 57 dB
• Voltage, Input: 36 V
• Voltage, Output: 35 V
• Voltage, Output, High: 3.5 V
• Voltage, Output, Low: 0.4 V
• Voltage, Supply: 12 V
• No. Of Pins: 8
• Rohs Compliant: Yes
• Primary Input Voltage: 36V
• No. Of Outputs: 1
• Switching Frequency Max: 250kHz
• Supply Voltage Max: 36V
• Low Dropout Operation: 100 % duty cycle
• For Use With: 497-4134 - EVAL BOARD FOR L5973 SERIES497-4133 - EVAL BOARD FOR L5973 SERIES
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

L5973D
1
1.1
1.2
Pin settings
Pin connection
Figure 2.
Pin description
Table 1.
N°
1
2
3
4
5
6
7
8
Pin connection (top view)
Pin description
COMP
SYNC
VREF
Type
GND
OUT
VCC
INH
FB
COMP
SYNC
OUT
INH
E/A output for frequency compensation.
3.3 V V
Regulator output.
Master/slave synchronization.
A logical signal (active high) disables the device. If INH not used the pin
must be grounded. When it is open an internal pull-up disable the
device.
Feedback input. Connecting directly to this pin results in an output
voltage of 1.23 V. An external resistive divider is required for higher
output voltages.
Ground.
Unregulated DC input voltage.
REF
1
2
3
4
. No cap is requested for stability.
D98IN955
8
7
6
5
Description
VCC
GND
VREF
FB
Pin settings
3/17