S20A-5SDAC
HDLV
Fsmily
Common Specifications
Min Nom Max Units Notes
Input
Voltage 4.5 5 5.5 Vdc
Enable Voltage
High = On 2.4 Vdc Open = On
Low = Off 0.4 Vdc Use Open Collector to
pull low
Enable Current 1 mA
Output
Current 0 32 A
Current Limit 40 50 60 A
Voltage Setpoint Accuracy ±2 %Vnom
Line Regulation ±10 mV
Load Regulation ±10 mV
Ripple / Noise 50 100 150 mV pp
Dynamic Response
10-20A load 200 mV ∆i/∆t=3 A/µs
100 µs ∆i/∆t=3 A/µs
20-10A load 200 mV ∆i/∆t=3 A/µs
100 µs ∆i/∆t=3 A/µs
Temperature Regulation ±0.02 %Vout/°C
General
Operating Temperature -25 85 °C
-40 85 °C optional
Storage Temperature -40 125 °C
Switching Frequency 200 300 400 kHz
Efficiency 90 %
Features
• 20-amp Output Current
• 90 % Efficiency
• Nonisolated Output
• Overcurrent Protection
• Remote Sense
• Short-circuit Protection
with auto-restart
• Fast Transient Response
• Programmable Output
• Output Precharge
Capability
Description
The S20A greatly expands the scope and capability of Bourns Switch
Power's High Density, Low Voltage (HDLV) product line. In a compact SIP
just 3 inches long the S20A provides 20 Amps of output current at voltages
between 1.25 and 3.5 V. Using the space saving packaging of a SIP,
the full featured S20A takes up just 1 in2of board space, and is only 1.0 inch
high. The S20A is also available in horizontal mount versions with
overall height of less than 0.4 inches.
The S20A is designed to work with the latest in 5 V distribution
architectures. It uses a 5 bit DAC to set the output between 1.25 and 3.5 V.
The programmable output allows standardization on a single part for
multiple output voltages. The S20A features superb dynamic response,
remote sense, remote enable, high temperature operation, and high
efficiency. The S20A is ideal for powering leading edge, high current ASICs,
microprocessors, and DSPs.
Reliable Electronic Solutions
Asia-Pacific:
Europe:
The Americas:
www.bourns.com
TEL +886- (0)2 25624117 • FAX +886- (0)2 25624116
TEL +41-41 768 5555 • FAX +41-41 768 5510
TEL +1-951 781 5500 • FAX +1-951 781-5700
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
S20A-5SDAC
HDLV
Fsmily
3.03 (76.9)
26 x 0.10 (2.54)
127
Pin Connections
2.90 (73.66)
0.175 ±0.015
(4.45 ±0.38)
0.09
(2.28)
0.05
(1.27)
0.03
(0.76)
0.175
(4.4)
0.225
(5.7)
0.5
(12.7)
AIRFLOW DIRECTION
3.03 (76.9)
0.50
(12.7)
26 x 0.100 (2.54)
2.900 (73.66)
0.400
(10.16)
0.065 (1.65)
0.150 (3.81) 0.225
(5.72)
127
27 x 0.045 (1.14) plated
4 x 0.070 (1.65) plated
1.00 max
0.175
±0.015
Recommended Footprint
xx±0.01
xxx±0.005
0.35 max
0.20 max
TOP VIEW SIDE VIEW
82
84
86
88
90
92
94
96
5101520
Series 1
Series 2
Series 3
Series 4
S20A-5SDAC THERMAL DERATING
S20A-5SDAC EFFICIENCY CURVES
0
5
10
15
20
25
40 50 60 70 80 90 100
100LFM
200LFM
300LFM
0 LFM
5 Remote Enable
6 VID4
7-11 Vin
12 No Connect
13-19 Gnd
20-25 Vout
26 Sense Vout
27 No Connect
inches (mm)
0.xx ±0.01 inches
0.xxx ±0.005 inches
1 VID0
2 VID1
3 VID2
4 VID3
OUTPUT CURRENT (A)
EFFICIENCY (%)
AMBIENT TEMP (C)
OUTPUT CURRENT (A)
0.35
(8.89)
0.033
(0.84)
1.0 max
(25.4)
VID4 VID3 VID2 VID1 VID0 Output
011111.30
011101.35
011011.40
011001.45
010111.50
010101.55
010011.60
010001.65
001111.70
001101.75
001011.80
001001.85
000111.90
000101.95
000012.00
000002.05
VID4 VID3 VID2 VID1 VID0 Output
111111.25*
111102.10
111012.20
111002.30
110112.40
110102.50
110012.60
110002.70
101112.80
101102.90
101013.00
101003.10
100113.20
100103.30
100013.40
100003.50
Output Voltage Selection
Notes
1. The S20A requires a minimum output capacitance of 300 µf for proper operation.
2. A minimum input capacitance of 1,200 µf is required for proper operation.
*Extended low voltage capability
Standard Options
Add option designators to the end of the part number. Example; S20A-5SDAC-L2
Option Description
L Horizontal mount with 0.95 '' board width
L2 Horizontal mount with 1.20 '' board width
Specifications are subject to change without notice.
Customers should verify actual device performance in their specific applications.
REV. 01/05
