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DC/DC Converters

TSR-3 Series, 3 A

Features

◆ High performance 3 Amp. switching regulator

◆ Suitable for positive & negative output circuit

◆ High efﬁciency up to 95 %

◆ Adjustable output voltages

◆ Wide input voltage ranges 2.5–5.5,

4.5–14 and 10–30 VDC

◆ Short circuit protection

◆ Remote On/Off input

◆ Low output ripple & noise

◆ 3-year product warranty The TSR 3 models are non isolated step down switching regulators. Since production

May 2013 they can also be operated with negative output voltage.

They come in a very compact open frame package of 15.5 x 9.4 x 6.2mm. The high

efﬁciency of up to 95% admits a full load operation up to 50°C and up to 85°C

with 50% current reduction. A low standby current, a very wider input range and

no requirement for heatsink give these switching regulators a signiﬁcant advantage

over linear regulators.

Togther with a remote On/Off input and protection against short circuit and over

temperature the TSR 3 Series models are ideal point of load regulators for high reli-

able and energy critical applications.

Order code * Input voltage range Output voltage

adjustable 6)

Output current max. Efﬁciency typ.

Positive output circuit

TSR 3-0533 2.5 – 5,5 VDC 1) 0.6 – 3.3 VDC 95 % at 2.5 VDC

TSR 3-1250 4.5 – 14 VDC 2) 0.59 – 6.0 VDC 93 % at 3.3 VDC

TSR 3-2450 10 – 30 VDC 3) 3.0 – 6.0 VDC 3 A 91 % at 5.0 VDC

TSR 3-24150 10 – 30 VDC 3) 5.0 – 15 VDC 95 % at 12 VDC

Negative output circuit

TSR 3-1250 4.7 – 13 VDC 4) -0.59 – -6.0 VDC 1.5 A at |Vout| >3.3 VDC

2.2 A at |Vout| <3.3 VDC 90 % at -3.3 VDC

TSR 3-2450 10 – 27 VDC 5) -3.0 – -6.0 VDC 2.2 A 90 % at -5.0 VDC

TSR 3-24150 10 – 25 VDC 5) -5.0 – -15 VDC 1.2 A 91 % at -12 VDC

Models

* Sufﬁx A for models with angular pins (see dimensions), availability on demand, no stocking item.

1) input voltage must be at least 0.5 V higher than output voltage

2) input voltage must be at least 2.0 V higher than output voltage, max. 9 VDC if output is <0.9 VDC

3) input voltage must be at least 3.0 V higher than output voltage

4) max. input voltage = 14-|Vout|

5) max. input voltage = 30-|Vout|

6) open trim input = min. output voltage

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Input Specifications

Maximum input current (@ Vin min. and 3 A output current) TSR 3-0533: 3.0 A

TSR 3-1250: 2.6 A

TSR 3-2450: 2.2 A

TSR 3-24150: 3.0 A

No load input current – positive output circuit 25 mA typ.

– negative output circuit 35 mA typ., 60 mA typ. for TSR 3-24150

Reflected ripple current – positive output circuit TSR 3-0533 and TSR 3-1250: 30 mA typ.

TSR 3-2450 & TSR 3-24150: 30 mA typ. with ext. filter, see fig. 1 page 3

– negative output circuit all models: 30 mA typ. with ext. filter, see fig. 2 page 3

Input filter internal capacitors

Output Specifications

Voltage set accuracy ±2 % (at full load)

Output voltage adjustment see application note page 3

Regulation – Input variation >2.5 Vout: 0.2 %, <2.5 Vout: 5 mV

– Load variation 0 – 100 % >2.5 Vout: 0.8 %, <2.5 Vout: 20 mV

– Load variation 10 – 90 % >2.5 Vout: 0.6 %, <2.5 Vout: 15 mV

Temperature coefficient ±1 %/°C max.

Overshoot startup voltage 1.0 % max.

Minimum load not required

Ripple and noise (20 MHz Bandwidth) TSR 3-0533: 30 mVp-p

TSR 3-1250: 60 mVp-p

TSR 3-2450: 75 mVp-p

TSR 3-24150: 150 mVp-p

Dynamic load response 50 % load change (upper half) 150 mV max. peak variation

(250 mV max. for TSR 3-24150)

120 µs max. response time

Startup rise time 10 % to 90 % Vout TSR 3-0533 & TSR 3-1250: 6 ms

TSR 3-2450 & TSR 3-24150: 10 ms

Short circuit protection continuous, automatic recovery

Current limitation TSR 3-0533: 280 % typ.

other models: 220 % typ.

Capacitive load – positive output; ESR > 1 mOhm TSR 3-24150: 500 µF max.

other models: 1000 µF max.

– positive output; ESR > 10 mOhm TSR 3-24150: 1200 µF max.

other models: 3000 µF max.

– negative output TSR 3-1250: 780 µF max.

TSR 3-2450: 2200 µF max.

TSR 3-24150: 580 µF max.

General Specifications

Temperature ranges – Operating (natural convection cooling 20 LFM) –40°C to +85°C

– Storage –55°C to +125°C

Derating 1.5 %/K above +50°C

Thermal shock acc. MIL-STD-810F

Humidity (non condensing) 5 % to 95 % rel H max.

Reliability, calculated MTBF (MIL-HDBK-217F, at +25°C, ground benign) >4’500’000 h

Isolation voltage none

Switching frequency TSR 3-0533 & TSR 3-1250: 600 kHz typ.

TSR 3-2450 & TSR 3-24150: 300 kHz typ.

Remote On/Off – On TSR 3-0533: open or Vin

(pin 1 ref. to GND) other models: open or 1 to 12 VDC

– Off 0 to 0.3 VDC

– Off idle current: TSR 3-0533 & TSR 3-1250: 1.5 mA typ.

TSR 3-2450 & TSR 3-24150: 6 mA typ.

Environmental compliance – Reach www.tracopower.com/info/reach-declaration.pdf

– RoHS RoHS directive 2011/65/EU

DC/DC Converters

TSR-3 Series 3 A

All speciﬁcations valid at nominal input voltage, full load and +25°C after warm-up time unless otherwise stated.

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Speciﬁcations can be changed without notice! Make sure you are using the latest documentation, downloadable at www.tracopower.com

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Outline Dimensions

DC/DC Converters

TSR-3 Series 3 A

Rev. September 10, 2018

Pin-Out

positive negative

1Remote On/Off

2+Vin (Vcc)

3GND –Vout

4+Vout GND

5Trim

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Dimensions in [mm], () = Inch

Pin pitch tolerances: ±0.25 (± 0.01)

Pin profile tolerance: ±0.1 (±0.004)

Other tolerances: ±0.5 (±0.02)

Applications notes

Input filter to reduce reflected ripple current

C1 = 220 µF, ESR <0.1 Ohm

C2 = 150 µF

L1 = 8.2 µH

Output voltage adjustment (for negative and positive circuit)

4 x 1.70 3.7

6.0

3.3 H

(4 x 0.06) (0.14)

(0.24)

(0.13)

quare pins

0.64 x 0.64

(0.025 x 0.025)

TSR 3-0533 & TSR 3-1250: W=9.4 (0.37) H=15.5 (0.61)

TSR 3-2450 & TSR 3-24150: W=10.4 (0.41) H=16.5 (0.65)

5.1

6.2

(0.20)

(0.25)

Input

TSR 3

GND

Output

Load

TSR 3

Rtrim

Model R trim [KOhm] 1/16 W

TSR 3-0533 1.2/(|Vout| -0.6)-0.01

TSR 3-1250 1.18/(|Vout| -0.59)

TSR 3-2450 11.2/(|Vo ut| -3 )

TSR 3-24150 8.4/(|Vout| -5)

(Component allocation is model specific)

Weight TSR 3-0533 & TSR 3-1250: 1.7 g

TSR 3-2450 & TSR 3-24150: 2.1 g

Input

TSR 3

GND

Outpu

Positive output circuit Negative output circuit

C1, C2 =10 µF, MLCC

fig. 1 fig. 2

Angular Pin version

(optional)

Standard version

(|Vout| = absolute value)

Supporting documents: www.tracopower.com/overview/tsr3