GS-R24FP
1.8 A DC-DC converter modules
Features
■
■
■
■
■
■
■
■
■
■
■
MTBF 1 000 000 hours (T
A
= 25
°C)
1.8 A max output current
35 V max input voltage
1.5 V max drop-out voltage
Remote logic inhibit/enable
Synchronization
Not-latching overload and short circuit
protection
Thermal shutdown
Fixed or adjustable output
No heatsink required
Operating temperature range -25 °C ÷ 85 °C
Packing type: V = vertical PTH
Description
The GS-R24FP series is a family of high
efficiency step down switching voltage regulator,
designed to replace linear regulators.
Based on ST L5973A device, this non isolated
family of regulators are suitable for the full
spectrum of applications including telecom,
industry, computer and distributed power system
applications having a widely ranging input
voltage.
Table 1.
b
O
so
Order codes
te
le
r
P
uc
od
[V]
1.8
± 4%
2.5
±
4
%
3.3
±
4
%
5.0
±
4
%
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
Packing type: S = horizontal SMD
Device summary
Output voltage
Input voltage
[V]
16
÷
35
16
÷
35
16
÷
35
16
÷
35
16
÷
35
Output ripple
[mVpp]
25
30
30
40
40
Efficiency
[%]
59 - 63
66 - 70
70 - 75
79 - 83
56
-
83
Notes
Fixed output voltage
Fixed output voltage
Fixed output voltage
Fixed output voltage
Progr. output voltage
GS-R24FP0181.8
GS-R24FP0251.8
GS-R24FP0331.8
GS-R24FP0501.8
GS-R24FP0001.8
1.235
÷
5.5
%
February 2008
Rev 2
1/15
www.st.com
15
Contents
GS-R24FP
Contents
1
Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.1
1.2
Pin connection and mechanical data (dimensions in mm) . . . . . . . . . . . . . 3
Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.1
2.2
2.3
Absolute maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thermal data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Thermal de-rating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3
4
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
4.1
4.2
4.3
4.4
4.5
4.6
4.7
4.8
4.9
Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Reference voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Inhibit function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Multiple units synchronization . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Current limitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Thermal shutdown . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Output voltage programming (GS-R24FP0001.8 only) . . . . . . . . . . . . . . . 9
Loop compensation (GS-R24FP0001.8 only) . . . . . . . . . . . . . . . . . . . . . . 9
Soldering . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
5
Additional features and protections . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
6
O
7
so
b
te
le
5.1
Output overvoltage protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
Ordering scheme . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2/15
GS-R24FP
Pin settings
1
1.1
Pin settings
Pin connection and mechanical data (dimensions in mm)
Figure 1.
Pin connection GS-R24FVxxx1.8
Figure 2.
Pin connection GS-R24FSxxx1.8
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
3/15
Pin settings
GS-R24FP
1.2
Pin description
Table 2.
Name
1
2
3
4
5
6
7
8
9
10
Pin description
Function
INH
Sync
V
ref
Input +
Input +
Input/output
GND
Input/output
GND
V
out
V
out
FB
Description
A logic high level disables the device. When the pin is open, an
internal pull up disables the device
Master/slave synchronization
3.3 V reference voltage
DC input voltage
DC input voltage
Return for input/output voltage source
Return for input/output voltage source
Regulated power output
Regulated power output
Feedback input, available on adjustable device and on request for
additional compensation
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
et
l
o
P
e
od
r
s)
t(
uc
4/15
GS-R24FP
Maximum ratings
2
2.1
Maximum ratings
Absolute maximum ratings
Table 3.
Symbol
V
I
I
out
V
1
V
2
V
10
DC input voltage
Maximum output current
INH
Sync
FB
Absolute maximum ratings
Parameter
Value
36
int. limit
-0.3 to V
i
-0.3 to 4
4
V
V
V
Unit
V
2.2
Thermal data
Table 4.
Symbol
T
STG
T
OP
Thermal data
Parameter
Storage temperature range
Operating ambient temperature
O
so
b
te
le
r
P
uc
od
s)
t(
bs
-O
l
o
te
e
r
P
od
Value
s)
t(
uc
°C
°C
Unit
-40
÷
105
-25
÷
85
5/15
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