Datasheet

R-78AA-1.0
Package Style and Pinning (mm)
Table 1: Adjustment Resistor Values
INNOLINE
DC/DC-Converter
R-78AAxx-1.0 SMD
Series
12.35
Bottom View
0.50
Top View
15.30
8.80
15.00
2.54x4
9.24
10 7
2
4
5
9.40
9.60
RECOM
R-78AAxx-1.0SMD
xxxx
1
2.54
13.00
1.80
10 7
2415
1.30
1.20
3
68
9
3
6
89
SMD 10Pin Package
Pin Connections
Pin #
1,2 +Vin
3,7,8,9 GND
4,5 +Vout
6 V adj
10 Remote On/Off
xx.x ±0.5mm
xx.xx ±0.25mm
Recommended Footprint Details
Rdown
Rup
Vadj
+V
o
GND
R3
R1
R2
+V
in
GND
Controlled IC
Vref
R1 R2 R3 Vref(V)
1.8V 10KΩ 21KΩ 5.6KΩ 1.23
2.5V 22KΩ 21KΩ 5.6KΩ 1.23
3.3V 16.9KΩ 10KΩ 5.6KΩ 1.23
5.0V 30.9KΩ 10KΩ 10KΩ 1.23
R2(R1+R3) x (Vref - Vo) + Vref x R1R3
Trim Down Rdown =
R
2Vo - Vref (R1 + R2)
R
2R3 (Vref - Vo) + Vref R1 (R2 + R3)
Trim up R
up =
R
2 (Vo - Vref) - Vref R1
I-18 www.recom-power.comREV: 2/2016
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