Datasheet

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DC/DC Step-Down Converter TSR 1 Series, 1 Amp

Models

• Up to 96 % efﬁciency

– No heat-sink required

• Pin compatible with LMxx linear regulators

• SIP-package ﬁts existing TO220 footprint

• Built in ﬁlter capacitors

• Operation temp. range –40°C to +85°C

• Short circuit protection

• Wide input operating range

• Excellent line / load regulation

• Low standby current

• 3-year product warranty

The TSR1 series step-down switching regulators are drop-in replacement for

inefﬁcient 78x linear regulators. A high efﬁciency up to 96 % allows full load

operation up to +60°C ambient temperature without the need of any heat-sink

or forced cooling. The TSR1 switching regulators provide other signiﬁcant fea-

tures over linear regulators, i.e. better output accuracy (±2 %), lower standby

current of 2 mA and no requirement of external capacitors. The high efﬁciency

and low standby power consumption makes these regulators an ideal solution

for many battery powered applications.

Order code Input voltage

range

Output voltage Output current Efﬁciency typ.

max. @ Vin min. @

Vin max.

TSR 1-2412 4.6 – 36 VDC* 1.2 VDC 74 % 62 %

TSR 1-2415 4.6 – 36 VDC* 1.5 VDC 78 % 65 %

TSR 1-2418 4.6 – 36 VDC* 1.8 VDC 82 % 69 %

TSR 1-2425 4.6 – 36 VDC* 2.5 VDC 87 % 75 %

TSR 1-2433 4.75 – 36 VDC* 3.3 VDC 1.0 A 91 % 78 %

TSR 1-2450 6.5 – 36 VDC* 5.0 VDC 94 % 84 %

TSR 1-2465 9.0 – 36 VDC* 6.5 VDC 93 % 87 %

TSR 1-2490 12 – 36 VDC* 9.0 VDC 95 % 90 %

TSR 1-24120 15 – 36 VDC* 12 VDC 95 % 92 %

TSR 1-24150 18 – 36 VDC* 15 VDC 96 % 94 %

Models

* For input voltage higher than 32 VDC an input capacitor 22 µF / 50 V is required. See application notes (page 3)

PAGE 1
DC/DC Step-Down Converter TSR 1 Series, 1 Amp • Up to 96 % efficiency – No heat-sink required • • • • • • • • • Pin compatible with LMxx linear regulators SIP-package fits existing TO-220 footprint Built in filter capacitors Operation temp. range –40°C to +85°C Short circuit protection Wide input operating range Excellent line / load regulation Low standby current 3-year product warranty The TSR-1 series step-down switching regulators are drop-in replacement for inefficient 78xx linear regulators.
PAGE 2
TSR 1 Series, 1 Amp Input Specifications Maximum input current (at Vin min. and 1 A output current) 1 A No load input current Reflected ripple current 1 mA typ. 150 mA Input filter internal capacitors, see application notes for to meet EN55022 class A Output Specifications Voltage set accuracy ±2 % (at full load) Regulation – Input variation 0.2 % – Load variation (10–100 %) 1.2&1.5 VDC models: 0.6 % other models: 0.4 % Overshoot startup voltage 1.0 % max.
PAGE 3
TSR 1 Series, 1 Amp Applications notes For input voltage higher than 32 VDC (max. 36 VDC) +Vin Input C1 = 22 µF / 50 V +Vout TSR 1 C1 Load GND Suggested filter to comply with EN55022 Class A limits Models C1 & C2 L1 10 µF / 50 V 1206 MLCC all models inductor (accessory) 5.6 µH / 3.5 A order code datasheet TCK-141 www.tracopower.com/products/tck141.pdf Outline Dimensions 7.6 (0.30) Bottom view 2.0 (0.08) 0.3 (0.01) 0.5(0.02) 0.5 (0.02) 3 4.