The device directly replaces legacy National (NSC) LM1576-ADJ and Texas Instruments LM1576 (TI). Assembles into TO-3 as LM1576K-ADJ and also into other alternative package options where required.
Features:
- Full military temperature range
- Output voltage range 1.23V to 37V ±2% max over line & load conditions
- Guaranteed 3A output current
- Wide input voltage range: 4V to 40 V
- 52 kHz fixed-frequency internal oscillator
- TTL shutdown capability, low-power standby mode
- Low power standby IQ <200µA typical
- High efficiency, typically >80%
- Uses readily available standard inductors
- Thermal shutdown and current-limit protection.
- Simple high efficiency step-down regulator
- Efficient pre-regulator for linear regulators
- On-card switching regulators
- Positive-to-negative voltage converter (inverting Buck-Boost)
- Isolated flyback converter using low external component count
- Negative boost converter.
** PART OBSOLETE - DISCONTINUED **
Applications:
Vendor:
SiS OBSOLETE
Electrical Datasheet
Die Physical Data:
Footprint: 6.600mm² (10230.031mil²)
Request Pad Layout
SiS OBSOLETE
Electrical Datasheet
Die Physical Data:
Footprint: 6.600mm² (10230.031mil²)
Request Pad Layout
Product Families: Used for this device are tabulated below.
Functional:
- Regulated Outputs: 1
- Ctrl Mode: Voltage Mode
Specification:
VIN (MIN): 4.00V
VIN (MAX): 40.0V
VOUT (MIN): 1.2V
VOUT (MAX): 37.00V
IOUT (MAX): 3.0A
Frequency (MAX): 42kHz
f(MAX): 63kHz
IQ: 5.000mA
Duty Cycle(Max): 98%
VIN (MAX): 40.0V
VOUT (MIN): 1.2V
VOUT (MAX): 37.00V
IOUT (MAX): 3.0A
Frequency (MAX): 42kHz
f(MAX): 63kHz
IQ: 5.000mA
Duty Cycle(Max): 98%
Other Detail: Important information for this device is tabulated below.
Traffic light setting for Minimum Order Quantity indicates the following:
- Green:Available from stock or at low factory MOQ.
- Amber: Available on factory order with MOQ.
- Red: High factory MOQ may apply, please ask for details.
Traffic light setting for High Reliability indicates the following:
- Green: This bare die is specified and tested for use in high reliability applications.
- Amber: This bare die can meet higher reliability specifications with additional testing & qualification, please ask for details.
- Red: This bare die is not specified or specifically designed for use in high reliability applications.
Traffic light setting for Space Grade indicates the following:
- Green: This bare die is qualified for space applications or has space level qualification data, please ask for details.
- Amber: This bare die can be specified for space applications with additional testing and qualification, please ask for details.
- Red: Suitability of this bare die for space applications is unknown and requires further qualification, please ask for details.
