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DC/DC Converters
TSRN-1 Series, 1 A Switching Regulator
Features
◆ SIP-package fits existing TO-220 footprint
◆ Suitable for positive & negative output circuit
◆ Pin compatible with LMxx linear regulators
◆ Built in filter capacitors
◆ Operation temp. range –40°C to +85°C
◆ No heat-sink required
◆ Over-temperature protection
◆ Short circuit protection
◆ Wide input range up to 42 VDC
◆ Excellent line / load regulation
◆ Low standby current
◆ 3-year product warranty
The new TSRN-1 series step-down switching regulators are drop-in replacement
for inefficient 78xx linear regulators. A high efficiency up to 95 % allows full load
operation up to +70°C (+85°C with derating) ambient temperature without the need
of any heat-sink or forced air cooling.
The TSRN-1 switching regulators provide other significant features over linear regu-
lators, i.e. better output accuracy (±2 %), lower standby current of ~2 mA and no
requirement of external capacitors. They are suitable for positive or negative output
circuits. The high efficiency and low standby power consumption make these regula-
tors an ideal solution for energy sensitive applications.
Order code 1) Input voltage Output voltage Output current Efficiency typ.
straight pins angular pins range 2)/ (nominal) max. @ Vin min. @
Vin max.
Positive output circuit
TSRN 1-2415 TSRN 1-2415A 4.6 – 42 VDC (12 VDC) 1.5 VDC 77 % 66 %
TSRN 1-2418 TSRN 1-2418A 4.6 – 42 VDC (12 VDC) 1.8 VDC 80 % 70 %
TSRN 1-2425 TSRN 1-2425A 4.6 – 42 VDC (12 VDC) 2.5 VDC 83 % 75 %
TSRN 1-2433 TSRN 1-2433A 4.6 – 42 VDC (12 VDC) 3.3 VDC 87 % 79 %
TSRN 1-2450 TSRN 1-2450A 6.5 – 42 VDC (12 VDC) 5.0 VDC 1.0 A 91 % 83 %
TSRN 1-2465 TSRN 1-2465A 8.0 – 42 VDC (12 VDC) 6.5 VDC 93 % 86 %
TSRN 1-2490 TSRN 1-2490A 10.5 – 42 VDC (12 VDC) 9.0 VD C 94 % 88 %
TSRN 1-24120 TSRN 1-24120A 13.5 – 42 VDC (24 VDC) 12 VDC 95 % 91 %
TSRN 1-24150 TSRN 1-24150A 16.5 – 42 VDC (24 VDC) 15 VDC 95 % 92 %
Negative output circuit
TSRN 1-2415 TSRN 1-2415A 4.6 – 32 VDC (12 VDC) –1.5 VDC 0.6 A 69 % 64 %
TSRN 1-2418 TSRN 1-2418A 4.6 – 32 VDC (12 VDC) –1.8 VDC 0.6 A 72 % 67 %
TSRN 1-2425 TSRN 1-2425A 4.6 – 32 VDC (12 VDC) –2.5 VDC 0.6 A 72 % 74 %
TSRN 1-2433 TSRN 1-2433A 4.6 – 32 VDC (12 VDC) –3.3 VDC 0.6 A 74 % 77 %
TSRN 1-2450 TSRN 1-2450A 6.5 – 31 VDC (12 VDC) –5.0 VDC 0.4 A 79 % 78 %
TSRN 1-2465 TSRN 1-2465A 8.0 – 29 VDC (12 VDC) –6.5 VDC 0.3 A 84 % 80 %
TSRN 1-2490 TSRN 1-2490A 10.5 – 27 VDC (12 VDC) –9.0 VD C 0.3 A 85 % 82 %
TSRN 1-24120 TSRN 1-24120A 13.5 – 24 VDC (12 VDC) –12 VDC 0.3 A 85 % 85 %
TSRN 1-24150 TSRN 1-24150A 16.5 – 21 VDC (12 VDC) –15 VDC 0.2 A 85 % 84 %
Models
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