Products Description

The N-Series 1×0.5 Inch Isolated Power Converter redefines miniaturization with its industry-smallest 25.4×12.7×11.0mm footprint, delivering 15W output at 85% peak efficiency. Engineered for space-critical applications, this DC-DC converter features 500Vdc reinforced isolation and integrated protection circuits, making it the optimal solution for portable medical devices, IoT edge nodes, and drone avionics where every cubic millimeter counts.

World Record: 15W in 7.2cm³ volume • 16-40V wide input • -55°C to 105°C operation • 8.5g ultralight design

Products Specification

Model number	Input range Vdc	Output voltage Vdc	Output current @FullLoad A	Efficiency %	Ripple and noise mV p-p	Maximum capacitor load uF
LM28S3R3N10-NNMG	16-40	3.3	3.1	75	20	600
LM28S5N15-NNMG	16-40	5.0	3	80	20	600
LM28S12N15-NNMG	16-40	12	1.25	84	60	1000
LM28S28N15-NNMG	16-40	28	0.54	85	60	470
LM28S24N15-NNMG	16-40	24	0.63	85	60	470

Parameter	Min	Typical	Max	Unit	Conditions
Input vVoltage range	16	28	40	Vdc	All models
Isolation voltage	-	-	500	Vdc	Input-output/case
Switching frequency	-	300	-	kHz	Nominal input
Operating temperature	-55	-	105	°C	H.Ex. external temperature
MTBF	2	-	-	Mhrs	MIL-HDBK-217F
Weight	-	8.5	-	g	-

Design Details

Mechanical Dimensions::25.4(L) × 12.7(W) × 11.0(H) mm (industry-standard N-Series)

product-600-221

Pin Configuration:

Pin	Designation	Function
1	Vin+	Positive input voltage
3	Vin-	Negative input voltage
2	ON/OFF	Remote control terminal
4	Vout-	Negative output voltage
5	Trim	Output voltage adjustment
6	Vout+	Positive output voltage

Thermal Innovation: Aluminum alloy baseplate with 10°C/W thermal resistance (natural convection)

Mounting: Standard through-hole soldering with 1.5mm pin diameter

Products features

Ultra-Miniaturized

50W power in 25.4×12.7×11.0mm (N-Series) footprint

Intelligent Protection

Input undervoltage lockout (13.0V cutoff), output short-circuit auto-recovery

Precision Control

±1% voltage regulation from -55°C to 105°C

Wide Logic Compatibility

ON/OFF pin supports 2.4V-25V control signals

Remote Management

Sense+/- pins enable ±2% load regulation at 1m distance

Thermal Resilience

Operates at 105°C baseplate temperature (derated)

Advantages

Passed 1500Vdc isolation test per IEC 62368-1
85% efficiency verified at 28V/0.54A output (LM28S28N15-NNMG)
ISO 7637-2 compliant automotive transients survival
500hr operation at 95% RH/60°C

500 thermal cycles (-55°C⇄125°C)

"0.1% output deviation during 50g vibration tests" - SGS Report