R-78AAxx-0.5 SMD
Series
INNOLINE
DC/DC-Converter
Table 1: Adjustment Resistor
Values
R1
R2
R3
Vref(V)
1.23
1.23
1.23
1.23
1.23
1.23
1.23
1.8V
2.5V
3.3V
5.0V
6.5V
9V
10KΩ
21KΩ
21KΩ
10KΩ
10KΩ
10KΩ
10KΩ
10KΩ
5.6KΩ
5.6KΩ
5.6KΩ
10KΩ
10KΩ
22.1KΩ
22.1KΩ
22KΩ
16.9KΩ
30.9KΩ
43KΩ
63.4KΩ
88.7KΩ
12V
+Vin
+Vo
Rdown
R1
Controlled IC
Vadj
R3
R2
R
up
GND
GND
Vref
R2(R1+R3) x (Vref - Vo) + Vref x R1R3
R2Vo - Vref (R1 + R2)
Trim Down Rdown =
R2R3 (Vref - Vo) + Vref R1 (R2 + R3)
R2 (Vo - Vref) - Vref R1
Trim up
Rup =
Package Style and Pinning (mm)
SMD 10Pin Package
9.60
9.40
15.30
15.00
9 8
10
7
6
RECOM
R-78AAxx-1.0SMD
xxxx
8.80
9.24
2 3
5
1
4
12.35
2.54x4
Pin Connections
Pin #
1,2
Recommended Footprint Details
0.50
+Vin
GND
3,7,8,9
4,5
10 8 7 6
9
+Vout
Top View
Bottom View
13.00
6
V adj
1 2
4 5
3
10
Remote On/Off
xx.x 0.5mm
xx.xx 0.25mm
1.30
2.54
1.80
1.20
The product information and specifications are subject to change without prior notice. RECOM products are not authorized for use in safety-critical applications (such as life support) without RECOM’s explicit
written consent. A safety-critical application is defined as an application where a failure of a RECOM product may reasonably be expected to endanger or cause loss of life, inflict bodily harm or damage property. The buyer
shall indemnify and hold harmless RECOM, its affiliated companies and its representatives against any damage claims in connection with the unauthorized use of RECOM products in such safety-critical applications.
www.recom-power.com
REV: 1/2015
I-11
RECOM [ RECOM INTERNATIONAL POWER ]
