Specifications

DC/DC Converters
TSRN-1SM Series, 1 A Switching Regulator
Features
◆ Compact SMD package
◆ Suitable for positive & negative output circuit
◆ Adjustable output voltage
◆ Wide input up to 42 VDC
◆ Remote On/Off input
◆ Built in filter capacitors
◆ Operation temp. range –40°C to +85°C
◆ No heat-sink required
◆ Over-temperature protection
◆ Short circuit protection
The new TSRN-1SM series are step-down non–isolated switching regulators in compact SMD package. They are an ideal solution to replace inefficient linear regula◆ Excellent line / load regulation
tors. The high efficiency up to 95 % allows full load operation up to +55°C (+85°C
◆ Low standby current
with derating) ambient temperature without the need of forced aircooling.
◆ Moisture sensitivity level (MSL) 1
The TSRN-1SN switching regulators provide other significant features over linear
regulators, i.e. better output accuracy (±2 %), lower standby current of ~4 mA and
◆ Qualified for leadfree reflow solder
no requirement of external capacitors. They are suitable for positive or negative
output circuits and offer a trim input for output voltage adjustment. The high efficiency, low standby power consumption and remote On/Off function make these
regulators an ideal solution for energy sensitive applications.
process
◆ 3-year product warranty
Models
Order code 1)
Input voltage
range
2)
/ (nominal)
Output voltage
nominal
trim range
Output current
3)
max.
Efficiency typ.
@ Vin min.
@ Vin 36VDC
Positive output circuit
TSRN 1-0525SM
3.0 – 5.5 VDC (5 VDC)
2.5 VDC
1.2 – 3.6 VDC
95.5 %
TSRN 1-2433SM
4.6 – 42 VDC (12 VDC)
3.3 VDC
1.5 – 5.5 VDC
87.5 %
80 %
TSRN 1-2450SM
6.5 – 42 VDC (12 VDC)
5.0 VDC
2.5 – 8.0 VDC
91.5 %
83.5 %
TSRN 1-2490SM
10.5 – 42 VDC (12 VDC)
9.0 VDC
4.5 – 12.6 VDC
94.5 %
89 %
TSRN 1-24120SM
13.5 – 42 VDC (24 VDC)
12 VDC
4.5 – 13.5 VDC
95.0 %
91 %
TSRN 1-24150SM
16.5 – 42 VDC (24 VDC)
15 VDC
4.5 – 15.5 VDC
95.5 %
92.5 %
1.0 A
95 %
(at 5.5VDC)
Negative output circuit
TSRN 1-2433SM
4.6 – 32 VDC (12 VDC)
-3.3 VDC
-1.5 – -5.5 VDC
0.6 A
74 %
77 %
TSRN 1-2450SM
4.6 – 31 VDC (12 VDC)
-5.0 VDC
-2.5 – -8.0 VDC
0.4 A
80 %
78 %
TSRN 1-2490SM
7 – 27 VDC (12 VDC)
-9.0 VDC
-4.5 – -12.6 VDC
0.3 A
85 %
82 %
TSRN 1-24120SM
7 – 24 VDC (12 VDC)
-12 VDC
-4.5 – -13.5 VDC
0.3 A
84 %
86 %
TSRN 1-24150SM
7 – 21 VDC (12 VDC)
-15 VDC
-4.5 – -15.5 VDC
0.2 A
85 %
84 %
1) Same order code for positive and negative output operation, see page 3 for circuits.
2) For input voltage higher 36 VDC an input capacitor 22 µF/ 50 V is required.
3) For positive output circuit, input voltage must be higher than output voltage set: >0.5 V for TSRN1-0525SM and >1.5 V for other models.
For negative output circuit, input voltage plus absolute output voltage set must not exceed 36 VDC (Vin + |Vout| < 36 VDC)
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Page 1 of 4
DC/DC Converters
TSRN-1SM Series
1A
Input Specifications
No load input current
– positive output circuit
TSRN 1-0525SM:
TSRN 1-2433SM:
other models:
– negative output circuit
-3.3 / -5.5 Vout models:
-9.0 / -12 Vout models:
TSRN 1-24150SM:
Reflected ripple current
6 mA typ.
1.5 mA typ.
4 mA typ.
3 mA typ.
7 mA typ.
10 mA typ.
100 mA typ.
Input filter internal capacitors
Output Specifications
Voltage set accuracy ±2 % (at full load)
Regulation
– Input variation 0.2 %
– Load variation 0 – 100 %
0.6 %
– Load variation 10 – 90 % 0.3 %
Startup voltage overshoot 1.0 % max.
Minimum load not required
Ripple and noise (20 MHz Bandwidth) – |Vout| = 1.2V – 8V
50 mVpk-pk max.
– |Vout| = 8.1V – 15V 75 mVpk-pk max.
Temperature coefficient ±0.015 % / °C max.
Dynamic load response (change of 50% to 100% load)
150 mV max. peak variation
250 µS max. response time
Startup time
– start up time at nominal Vin, constant resistive load 5 mS typ.
Short circuit protection continuous, automatic recovery
Current limitation
Capacitive load
TSRN 1-0525SM: at 4.0 A typ.
other models: at 2.0 A typ.
470 µF max.
General Specifications
Temperature ranges
– Operating –40°C to +85°C
– case temperature
+130°C. max.
– Storage –55°C to +125°C
Derating
– positive output circuit 1.7 %/K above +55°C
– negative output circiut 2.5 %/K above +65°C
Thermal shock, mechanical shock & vibration EN 61373, MIL-STD-810F
– Test conditions
www.tracopower.com/products/mil810.pdf
Overtemperature protection at +170°C (on internal IC)
Humidity (non condensing) 90 % rel H max.
Reliability, calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >4´500’000 h
Isolation voltage none
Switching frequency
TSRN 1-0525SM: 410 kHz typ.
TSRN 1-2433SM: 300 kHz typ.
other models: 580 kHz typ.
Safety standards (designed to meet) UL/cUL 60950-1, IEC/EN 60950-1
Remote On/Off – Control pin referance for positive output circuitGND
– Control pin referance for negative output circuit-Vout
– On: 2 – 5 VDC or open circuit.
– Off: 0 – 0.8 VDC or short circuit
– Off idle current: 1.2 mA typ.
Environmental compliance
– Reach www.tracopower.com/products/tsrn1sm-reach.pdf
– RoHS RoHS directive 2011/65/EU
All specifications valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.
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Page 2 of 4
DC/DC Converters
TSRN-1SM Series
1A
Physical Specifications
Casing material non-conductive plastic (UL94V-0 rated)
Potting material epoxy, (UL 94V-0 rated)
Weight 1.7 g (0.06 oz)
Lead-free reflow solder process as per J-STD-020D.01 (to find at:
www.jedec.org - free registration rqueired)
– max. peak body temperature 245°C
Moisture sensitivity level (MSL) level 1 as per IPC J-STD-033B.1 (to find at:
www.jedec.org - free registration required)
Washing baking after washing: 100°C for 30 min.
Packaging
www.tracopower.com/products/tsrn1sm-pack.pdf
Applications notes
Positive output operation:
+Vin
1
5
+Vout
TSRN 1SM
C1
10
C1 = 22 µF/ 50 V (required only if input
voltage is higher than 36 V)
7,9
Remote On/Off
GND
GND
(Open Remote On/Off input = On)
Negative output operation (not for model TSRN 1-0525SM):
GND
+Vin
1
C1
GND
5
TSRN 1SM
10
C2
C1 = 10 µF / 50 V, 1210 X5R MLCC
C2 = 10 µF / 25 V, 1206 X5R MLCC
7,9
Remote On/Off
-Vout
(Open Remote On/Off input = On)
Output voltage adjustment:
6
7, 9
Trim Down
6
RD
RU
Trim Up
5
Model
RU [KOhm]
RD [KOhm]
TSRN 1-0525SM
40.75 / (Vo – 2.5)
(Vo . 50.75 – 40.75) / (2.5 – Vo)
TSRN 1-2433SM
26.4 / (Vo – 3.3)
(Vo . 33 – 26.4) / (3.3 – Vo)
TSRN 1-2450SM
160 / (Vo – 5)
(Vo . 200 – 160) / (5 – Vo)
TSRN 1-2490SM
80 / (Vo – 9)
(Vo . 100 – 80) / (9 – Vo)
TSRN 1-24120SM
240 / (Vo – 12)
(Vo . 300 – 240) / (12 – Vo)
TSRN 1-24150SM
240 / (Vo – 15)
(Vo . 300 – 240) / (15 – Vo)
Vo = output voltage to be adjusted.
Calculate with absolute values for negative output circuit
Open Trim = nominal output voltage
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DC/DC Converters
TSRN-1SM Series
1A
Outline Dimensions
(0.29)
(0.10)
(0.20)
10
7
9
6
5.08
(0.10)
2.54
(0.20)
2.54
(0.10)
(0.47)
11.82
top view
1
9.7
5
6
(0.37)
7
9.3
9
(0.38)
(0.10)
1
10
(0.51)
2.54
12.92
9.3
(0.60)
(0.37)
15.2
2.54
5.08
1.5
(0.006)
7.3
0.30 (0.01)
Solder Pad Dimension
10.16
(0.40)
5
10.16
(0.40)
0.5 (0.02)
Pin-Out
Pin
pos.
neg.
1
+Vin
+Vin
5
+Vout
GND
6
Trim
7
GND
-Vout
9
GND
-Vout
10
Remote On/Off
Dimensions in [mm], () = Inch
Pin pitch tolerances: ±0.25 (±0.01)
Pin profile tolerance: ±0.1 (±0.004)
Other tolerances: ±0.5 (±0.02)
Specifications can be changed without notice! Make sure you are using the latest documentation, downloadable at www.tracopower.com
www.tracopower.com
Rev. February 07. 2014
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