LR5000W Datasheet, PDF (2/2 Pages) MicroPower Direct, LLC – Ultra-Miniature, SMT 50W, Wide Input Range POL Switching Regulator

Model Selection Guide
Typical Connection Diagram
Model
Number
Input
Voltage (VDC)
Nominal Range
Output
Voltage Current
(VDC) (A, Max)
LR5003W-06 3.3
3.0 - 5.5 0.75 - 3.3
6.0
LR5003W-10 3.3
3.0 - 5.5 0.75 - 3.3 10.0
LR5003W-16 3.3
3.0 - 5.5 0.75 - 3.3 16.0
LR5012W-06 12
10.0 - 14.0 0.75 - 5.0
6.0
LR5012W-10 12 10.0 - 14.0 0.75 - 5.0 10.0
LR5012W-16 12 10.0 - 14.0 0.75 - 5.0 16.0
Notes:
1. An overtemperature protection circuit shuts down the converter if
the temperature at the output inductor exceeds 115°C. The unit will
restart automatically when the temperature at the output inductor
drops below 110°C.
2. For a 3.3V output, the input range is 4.0 to 5.5 VDC
3. No minimum load is required. Operation at no-load will not
damage these units.
4. These converters require no additional external components to
meet specifications. However, using external capacitors as shown
in the typical connection drawing at right may lower noise in some
applications.
5. Transient recovery is measured to within a 1% error band for a load
step change of 25% to 100%.
6. It is recommended that a fuse be used on the input of a power
supply for protection. Contact the factory for the correct rating.
Derating Curve
1. C1 and C2 are Electrolytic capacitors. C2 should have a low ESR.
C3 is a ceramic capacitor.
2. When not being used, the Remote Sense pin (pin 3) should be
connected to VOUT as close to the converter as possible.
3. The output voltage of the LR50xxW may be trimmed down by
connecting an external resistor between the Trim Pin (pin 4) and
Ground (pin 6). This resistor value (in kΩ) is given by:
21.07
LR5003W-xx RTRIM =
- 5.11
(VO - 0.7525)
Mechanical Dimensions
10.5
LR5012W-xx RTRIM =
- 1.0
(VO - 0.7525)
RTrim values for typical output levels are:
Output Voltage
0.75 VDC
1.00 VDC
1.20 VDC
1.50 VDC
1.80 VDC
2.00 VDC
2.50 VDC
3.30 VDC
5.00 VDC
LR5003W-xx
Open
80.021 kΩ
41.973 kΩ
23.077 kΩ
15.004 kΩ
11.779 kΩ
6.947 kΩ
3.160 kΩ
---
LR5012W-xx
Open
41.424 kΩ
22.460 kΩ
13.050 kΩ
9.024 kΩ
7.416 kΩ
5.009 kΩ
3.122 kΩ
1.472 kΩ
4. The Control input (pin 11) uses TTL compatible logic as follows:
Unit
ON
OFF
Control Pin
Open or VIN
Grnd or < 0.4V
Pin Connections
Pin Function
1
Vin
2 Control
3
Sense
4
Trim
5
Vout
6
Gnd
MicroPower Direct
www.micropowerdirect.com
Notes:
• All dimensions are typical in inches (mm)
• Tolerance x.xx = ±0.01 (±0.25)
292 Page Street Ste D Stoughton, MA 02072 • TEL: [phone] • FAX: [phone] • E-Mail: [e-mail]