R-78AA-1.0 Datasheet, PDF (4/4 Pages) Recom International Power – 1.0 AMP SMD Single Output

INNOLINE
DC/DC-Converter
Table 1: Adjustment Resistor Values
1.8V
2.5V
3.3V
5.0V
R-78AAxx-1.0 SMD
Series
R1
10KΩ
22KΩ
16.9KΩ
30.9KΩ
R2
21KΩ
21KΩ
10KΩ
10KΩ
R3
5.6KΩ
5.6KΩ
5.6KΩ
10KΩ
Vref(V)
1.23
1.23
1.23
1.23
+Vin
+Vo
Rdown
R1
Controlled IC
R3
Vadj
R2
Rup
GND
GND
Vref
Trim Down Rdown =
R2(R1+R3) x (Vref - Vo) + Vref x R1R3
R2Vo - Vref (R1 + R2)
Trim up
Rup =
R2R3 (Vref - Vo) + Vref R1 (R2 + R3)
R2 (Vo - Vref) - Vref R1
Package Style and Pinning (mm)
SMD 10Pin Package
15.30
9.60
15.00
9.40
8.80
9.24
10 9 8 7 6
RECOM
R-78AAxx-1.0SMD
xxxx
2.54x4
12.35
12345
0.50
Bottom View
2.54
1.30
Recommended Footprint Details
10 9 8 7 6
13.00 ^{Top View}
12 34 5
1.20
1.80
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
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.
I-18
REV: 1/2015
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