Texas Instruments 78SR100 Series Data Sheet
Summary
The 78SR100 series offers reliable, high-efficiency integrated switching regulators (ISRs) crucial for stable power management in compact electronics. This guide details these wide input voltage step-down converters, featuring >85% efficiency and built-in protection against short circuits and overheating. Designed with a minimal footprint, the manual provides comprehensive technical specifications, performance graphs (ripple, load), and guidelines needed by hardware engineers to select the perfect regulated power solution for diverse applications.
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查询7 8 S R 1 0 0供应商 For assistance or to order, call (800) 531-5782
1.5 AMP POSITIVE STEP-DOWN
Revised 6/30/98
INTEGRATED SWITCHING REGULATOR
The 78SR100 is a series of wide input
Very Small Footprint voltage, 3-terminal Integrated Switching High Efficiency > 85% Regulators (ISRs). These ISRs have a maxi- Self-Contained Inductor mum output current of 1.5A and an output Internal Short-Circuit Protection voltage that is laser trimmed to a variety of Over-Temperature Protection industry standard voltages. Wide Input Range These 78 series regulators have excellent
line and load regulation with internal short- circuit and over-temperature protection, are very flexible, and may be used in a wide variety of applications.
Pin-Out Information Ordering Information
Pin Function 78SR1 CXX
Output Voltage Package Suffix
Standard Application
05 = 5.0 Volts V = Vertical Mount
53 = 5.25 Volts S = Surface Mount 06 = 6.0 Volts H = Horizontal
Vin Vout
78SR100 74 = 7.15 Volts Mount
08 = 8.0 Volts C1 C2 09 = 9.0 Volts 10 = 10.0 Volts
GNDGND
12 = 12.0 Volts 14 = 13.9 Volts C1 = Optional 1µF ceramic 15 = 15.0 Volts
C2 = Optional 1µF ceramic
Pkg Style 500
Specifications
78SR100 SERIES
Characteristics (Ta = 25°C unless noted) Symbols Conditions Min Typ Max Units Output Current Io Over Vin range 0.1* 1.5 Short Circuit Current Isc Vin = Vin min 3.5 Apk Input Voltage Range Vin 0.1 ≤ Io ≤ 1.5A Vo= 5V
Vo= 12V 14.5
Output Voltage Tolerance ∆Vo Over Vin range, Io=1.5A
±1.0 ±2.0 %Vo Ta = 0°C to +60°C
Line Regulation Regline Over Vin range ±0.2 ±0.4 %Vo Load Regulation Regload 0.1 ≤ Io ≤ 1.5A ±0.1 ±0.2 %Vo Vo Ripple/Noise Vn Vin= 9V, Io= 1.5A Vo= 5V m Vpp
Vin= 16V, Io= 1.5A Vo= 12V m Vpp
Transient Response ttr 50% load change µSec
Vo over/undershoot %Vo
Efficiency Vin= 10V, Io= 1A Vo= 5V
Vin= 17V, Io= 1A Vo= 12V
Switching Frequency ƒo Over Vin range, Io=1.5A k Hz Absolute Maximum Ta
Operating Temperature Range Recommended Operating Ta Free Air Convection, (40-60LFM)
Temperature Range At Vin= 24V, Io=1.0A Thermal Resistance θja Free Air Convection, (40-60LFM) °C/W Storage Temperature Ts -40 +125 °C Mechanical Shock Per Mil-STD-883D, Method 2002.3 G’s Mechanical Vibration Per Mil-STD-883D, Method 2007.2,
G’s20-2000 Hz, soldered in a PC board
Weight 6.5 grams *ISR will operate down to no load with reduced specifications. **See Thermal Derating chart.
Power Trends, Inc. 27715 Diehl Road, Warrenville, IL 60555 (800) 531-5782 Fax: (630) 393-6902 http://www.powertrends.com2
Page Summary Contents For Texas Instruments 78SR100 Series Data Sheet
Manual Details
| Brand | Texas Instruments |
|---|---|
| Pages | 3 |
| File Size | 206.95 KB |
| Published | June 04, 2026 |
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Frequently Asked Questions
What is the maximum output current rating?
The 78SR100 series regulators have a maximum output current of 1.5A.
What built-in protection features do these regulators possess?
They include internal short-circuit protection and over-temperature protection, in addition to having excellent line and load regulation.
How can I determine the correct part number for a specific voltage?
The ordering information uses codes combined with the desired output voltage (Vout), such as '78SR133_' for 3.3 VDC or '78SR112_' for 12.0 VDC.
Are these regulators suitable for critical life-support systems?
No, TI products are not designed, authorized, or warranted for use in life-support devices or other critical applications.