SS26ABA View Datasheet(PDF) - C AND D TECHNOLOGIES
Part Name
Description
MFG CO.
'SS26ABA' PDF : 4 Pages View PDF
Programming
To program the SS26 SuperSIPTM for Vout<3.3, connect
resistor across pins 8 (TRIM) and 1(Vo). For Vout>3.3, re-
sistor is connected across pins 8 and 4 (Gnd).
Table 2
Vout Resistor Value
1.8
576Ω
1.9
1.21k
2.0
1.96k
2.1
2.8k
2.2
3.83k
2.3
4.99k
2.4
6.49k
2.5
8.25k
2.6
10.7k
2.7
13.7k
Vout ResistorValue
2.8
18.2k
2.9
24.3k
3.0
34.8k
3.1
54.9k
3.2
110.0k
3.3
OPEN
3.4
66.5k
3.5
29.4k
3.6
18.2k
Transient Response
Operating conditions are as follows: Vin=5V, Vo=3.3V, Load
change from Io=0% to Io=100%, TA=25°C, Cin=0F, Co=µF.
Thermal Design Guide
Locate your operating current, read the junction temp
rise from the graph and add to your maximum ambient.
135°C is the maximum allowable operating junction tem-
perature. Test conditions: Device soldered into 4” x 4”
PCB, 2 sided with power and ground planes for heat con-
duction. Due to the difficulty in predicting the thermal
effects of airflow velocity and direction, and thermal con-
duction through ground planes it is important that the SS26
SuperSIPTM be evaluated thermally in each application.
For high ambient temperature/high current application
please request our Application Note 35-118-01, “Accurate
Measurements of SS26 SuperSIPTM Junction Tempera-
ture”, for further assistance.
Tj Rise vs. Io
(Junction Temp Rise vs. Output Current)
70
60
50
40
30
STILL
AIR
100LFM
300LFM
20
10
0
OUTPUT CURRENT - AMPS
Operating conditions are as follows: Vin=5V, Vo=3.3V, Load
change from Io=100% to Io=0%, TA=25°C, Cin=0F, Co=µF.
Efficiency
100
95
90
3.3V 25C
85
2.1V 25C
80
75
0.5
1.5
2.5
3.5
4.5
5.5
OUTPUT CURRENT AMPS
Vo=3.3V, Cout-Oµf, Vi=5V, Cin=100µf
SUPERSIP26 11/99 REV C
Page 3
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