Products Description

The Ultra-Thin Isolated Power Converters are designed for space-critical applications. Both feature 1500Vdc reinforced isolation, integrated protection circuits, and operate in temperatures from -55°C to 105°C. With ultra-light designs, they are ideal for portable medical devices, IoT nodes, and drone avionics, offering unmatched performance in volumes as small as 7.2cm³.

Products Specification

Product series	Model number	Input range Vdc	Output voltage Vdc	Output current @Full Load A	Efficiency %	Ripple and noise mV p-p	Maximum capacitor load uF
G	LM28S5G15-NNMG	16-40	5.0	3	82	15	2000
	LM28S12G15-NNMG	16-40	12	1.25	85	20	470
	LM28S15G15-NNMG	16-40	15	1	81.5	50	1000
	LM28S5G15-NNMG	16-40	5.0	3	82	15	2000
I	LM28S5I10-NNMG	16-40	5.0	2	86	50	680
	LM28S12I30-NNM	16-40	12	2.5	89	50	1000
	LM28S28I50-NNM	16-40	28	1.8	90	150	1000
	LM28S24I50-NNM	16-40	24	2.1	90	150	1000

Parameter	Min	Typical	Max	Unit	Conditions
Input voltage range	16	28	40	Vdc	All models
Isolation voltage	-	-	1500	Vdc	Input-output/case
Switching frequency	-	330(G series);300(I series)	-	kHz	Nominal input
Operating temperature	-55	-	105	°C	H.Ex. external temperature
MTBF	2	-	-	Mhrs	MIL-HDBK-217F
Weight	-	10(G series);20(I series)	-	g	-

Design Details

Mechanical Dimensions:32.0(L) × 19.3(W) × 7.0(H) mm (industry-standard G Series)

product-600-280

Mechanical Dimensions:40.0(L) × 26.0(W) × 8.0(H) mm (industry-standard I-Series)

product-600-276

Pin Configuration:

G Series
Pin	Designation	Function
1/2	Vin+	Positive input voltage
10	NC	No Connection
11/12	Vout-	Negative output voltage
13/14	Vout+	Positive output voltage
15	NC	No Connection
16	Trim	Output voltage adjustment
20	ON/OFF	Remote control terminal
23/24	Vin-	Negative input voltage
I Series
Pin	Designation	Function
1	Vin+	Positive input voltage
2	NC	NO Pins
3	ON/OFF	Remote control terminal
4	Vin-	Negative input voltage
5	Vout-	Negative output voltage
6	NC	NO Pins
7	Trim	Output voltage adjustment
8	NC	NO Pins
9	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

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 3.5V-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
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