DMS-78xxSR Datel, DMS-78xxSR Datasheet - Page 2

• Manufacturer Part Number: DMS-78xxSR
• Description: 3.3V/5V/12V Outputs High-Effi ciency Switching Regulators with LM78XX Pinouts
• Manufacturer: Datel

Technical Notes (continued)
8. Dropout Voltage: 78SR series regulators described in this data sheet
DATEL, Inc., Mansfi eld, MA 02048 (USA) • Tel: [phone] Fax: [phone] • E–mail: [e-mail] • Internet: www.datel.com
Typical Dropout Voltage
7803SR
7805SR
7812SR
78SR Series
of the pc-board. However, because the surface of inductor L1 on
78XXSRH models is electrically conductive, it must not be allowed to
come in contact with any exposed pc-board traces, other than power
ground (GND).
While the 2-mil-thick (0.05mm) polyester label attached to L1 provides
some degree of electrical insulation (only if L1 sits perfectly fl at on
the pc-board), it is recommended that a 0.020” (0.5mm) clearance be
maintained between L1 and all exposed pc-board traces.
specify a minimum input voltage at which full-load accuracy and output
regulation are guaranteed (7.5V for 7803SR and 7805SR, and 15.0V
for 7812SR). However, these devices will stay in regulation at lower
input voltages if they are operated at less than their rated loads.
The following dropout-voltage data, derived from sample testing per-
formed at an ambient temperature of +25°C with resistive loads, should
be used for information purposes only. For these tests, a unit was
considered to be out of regulation when its output changed by more
+/-0.005Vdc from its nominal value. All voltages were measured directly
at the regulator’s I/O pins.
0% Load
12.8V
6.0V
6.3V
25% Load
13.0V
6.2V
6.2V
50% Load
12.8V
6.2V
6.2V
H I G H - E F F I C I E N C Y S W I T C H I N G R E G U L A T O R S
100% Load
13.0V
6.3V
6.8V
2
Performance/Functional Specifi cations
Typical at T
➀ See Technical Note 5.
➁ While these regulators can withstand a continuous short-circuit across their
DATEL Part No.
Standard Pin Package
7803SR
7805SR
7812SR
Horizontal Pin Package
7803SRH
7805SRH
7812SRH
Input/Output
Output Voltage
Rated Output Current
Output Voltage Accuracy
Input Voltage Range ➀
Line Regulation (100% load)
Load Regulation (0-100% load)
Quiescent Current
Input Current
Effi ciency
Transient Response
Input & Output Noise
Short Circuit Protection ➁
Isolation
Overvoltage Protection
Undervoltage Protection
Environmental
Operating Temperature
Storage Temperature
Cooling
Humidity (Non-condensing)
Physical
Mechanical
Package
Pins
Weight
Pin Soldering
Ordering Information
Models
Models
output terminals, they will experience a signifi cant temperature rise. Extended
short-circuit operation will adversely affect the unit’s reliability.
A
= +25°C
Output Voltage
+12.0Vdc
+12.0Vdc
+3.3Vdc
+5.0Vdc
+3.3Vdc
+5.0Vdc
7803SR
+3.3Vdc
0.5A
±2%
+7.5-36Vdc
±0.3%
±0.2%
7803SR
Output Current
See Mechanical Specifi cations
0.025” (0.64mm) square,
See Performance Curves
See Performance Curves
See Performance Curves
See Performance Curves
0.5A
0.5A
0.4A
0.5A
0.5A
0.4A
+260°C for 5 seconds
Free Air Convection
3mA typ., 5mA max.
0.08 ounces (2.2g)
tin-plated bronze
Open-frame SIP
–40 to +70°C
–40 to +85°C
Continuous
0 to 85%
7805SR
+5.0Vdc
0.5A
±1.5%
+7.5-36Vdc +15-36Vdc
±0.3%
±0.2%
7805SR
None
None
None
Input Voltage
+7.5-36Vdc
+7.5-36Vdc
+7.5-36Vdc
+7.5-36Vdc
+15-36Vdc
+15-36Vdc
7812SR
+12.0Vdc
0.4A
±2%
±0.3%
±0.2%
7812SR