L296 STMicroelectronics, L296 Datasheet - Page 2

• Manufacturer Part Number: L296
• Description: IC REG SW HIGH CURR MULTIWATT15
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of L296

• Internal Switch(s): Yes
• Synchronous Rectifier: No
• Number Of Outputs: 1
• Voltage - Output: 5.1 ~ 40 V
• Current - Output: 4A
• Frequency - Switching: 100kHz ~ 200kHz
• Voltage - Input: 9 ~ 46 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: Multiwatt-15 (Vertical, Bent and Staggered Leads)
• Power - Output: 20W
• Output Voltage: 40 V
• Output Current: 4 A
• Input Voltage: 9 V to 46 V
• Switching Frequency: 200 KHz
• Operating Temperature Range: - 40 C to + 150 C
• Mounting Style: Through Hole
• Duty Cycle (max): 100 %
• Primary Input Voltage: 40V
• No. Of Outputs: 1
• No. Of Pins: 15
• Frequency: 200GHz
• Ic Generic Number: 296
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-2939-5

PIN FUNCTIONS
L296 - L296P
BLOCK DIAGRAM
2/22
N
10
11
12
13
14
15
1
2
3
4
5
6
7
8
9
CROWBAR OUTPUT SCR gate drive output of the crowbar circuit.
SUPPLY VOLTAGE
FEEDBACK INPUT
CROWBAR INPUT
COMPENSATION
CURRENT LIMIT
RESET OUTPUT
RESET DELAY
INHIBIT INPUT
RESET INPUT
OSCILLATOR
SOFT START
FREQUENCY
SYNC INPUT
GROUND
OUTPUT
Name
Voltage Sense Input for Crowbar Overvoltage Protection. Normally connected to the
feedback input thus triggering the SCR when V
also monitor the input and a voltage divider can be added to increase the threshold.
Connected to ground when SCR not used.
Regulator Output
Unrergulated Voltage Input. An internal Regulator Powers the L296s Internal Logic.
A resistor connected between this terminal and ground sets the current limiter
threshold. If this terminal is left unconnected the threshold is internally set (see
electrical characteristics).
Soft Start Time Constant. A capacitor is connected between this terminal and ground
to define the soft start time constant. This capacitor also determines the average
short circuit output current.
TTL – Level Remote Inhibit. A logic high level on this input disables the device.
Multiple L296s are synchronized by connecting the pin 7 inputs together and omitting
the oscillator RC network on all but one device.
Common Ground Terminal
A series RC network connected between this terminal and ground determines the
regulation loop gain characteristics.
The Feedback Terminal on the Regulation Loop. The output is connected directly to
this terminal for 5.1V operation ; it is connected via a divider for higher voltages.
A parallel RC networki connected to this terminal determines the switching frequency.
This pin must be connected to pin 7 input when the internal oscillator is used.
Input of the Reset Circuit. The threshold is roughly 5 V. It may be connected to the
feedback point or via a divider to the input.
A capacitor connected between this terminal and ground determines the reset signal
delay time.
Open collector reset signal output. This output is high when the supply is safe.
Function
out
exceeds nominal by 20 %. May