| Customization: | Available |
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| Conductive Type: | Bipolar Integrated Circuit |
| Integration: | GSI |
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| Pin | Symbol | Description |
| 16 | EN | Enable pin, EN connects high to turn on the module and low to turn off the module. When left open, this pin has an internal 2MΩ resistor connected to ground and the module is turned off. |
| 20,21 | PG | Power Supply Normal Output Indicator Pin. |
| 17 | FB | Voltage feedback pin. This pin connects to an external divider resistor to regulate the output voltage. |
| 9,10,11,12 | VOUT | Output voltage pin. |
| 18 | AGND | Signal ground. This pin is not internally connected to system ground; ensure that AGND is connected to system ground during PCB layout. |
| 1,2,3,4,5,24 | PGND | System ground. This pin is the reference ground for regulating the output voltage. |
| 7,8,13,14,23 | SW | Switch output pin. Connect using wide PCB traces. |
| 22 | VIN | Voltage input pin. Connect VIN to the input power supply to power the module. |
| 6,15,19 | NC | Suspended. |
| Product model | Input | Output | Dimensions and Packaging | Packing | |
| Input Range | Nominal Input | ||||
| FHT3860 | 2.3V~5.5V | -- | 0.5V~3.3V/6A | 4mm × 6mm × 1.6mm (LGA) | Tray |
| Absolute Maximum Ratings | Condition | Minimum value | Nominal value | Maximum value | Unit |
| VIN | -0.3 | 7 | V | ||
| pg, sw, fb, en | -0.3 | VIN+0.3 | V | ||
| Storage Temperature | -40 | +150 | ºC | ||
| Input Characteristics | Condition | Minimum value | Nominal value | Maximum value | Unit |
| Input voltage range | 2.3 | 5.5 | V |
| Input current at full load | VIN =5.5V ,VOUT =1.8V ,IOUT=6A | 2.18 | A | ||
| Low voltage full load input current | VIN =3V ,VOUT =1.8V ,IOUT=6A | 4.02 | A | ||
| Static Current | VIN = 3.6V, VOUT = 1.8V ,IOUT=0A | 40 | µA | ||
| Input current at shutdown | VIN =3.6V ,EN=GND | 3 | μA | ||
| General Requirements | Condition | Minimum Value | Nominal Value | Maximum Value | Unit |
| Switching frequency | 3 | MHz | |||
| Soft start time | 3 | ms | |||
| FB voltage | 495 | 500 | 505 mV | mV | |
| Functionality | Condition | Minimum value | Nominal value | Maximum value | Unit |
| EN High level | 1.2 | V | |||
| EN Low | 0.5 V | V | |||
| PGOOD indication threshold | VOUT Rising | 96.5% | V | ||
| VOUT Falling | 92.5% | V | |||
| Output Characteristics | Condition | Minimum value | Nominal value | Maximum value | Unit |
| Output Voltage | Adjusted by RFB resistor | 0.5 | 3.3 | V | |
| Linear Regulation | VOUT= 1.8V ,3.3V < VIN< 5.5V ,ILOAD = 6A | ±1 | % | ||
| Load Regulation | VIN=3.3V ,VOUT=1.8V,0A < ILOAD ≤ 6A | ±1 | % | ||
| Ripple and Noise | VIN=3.3V ,VOUT=1.8V ,IOUT =6A, Cout =22uF ×3, 20MHz bandwidth | 10 | mV | ||
| Dynamic Load Response | 50-100% ILOAD ,di/dt=3A/μS; VIN =3.3V ,VOUT =1.8V, Cout =22uF ×3 |
50 |
mV |
| Protection Characteristics | Conditions | Minimum Value | Nominal value | Maximum value | Unit |
| Undervoltage Blocking Threshold | INV rise | 2.0 | 2.2 | ||
| Thermal shutdown | 150 | ºC | |||
| Thermal shutdown hysteresis | 20 ºC | ºC | |||
| Structural Characteristics | Condition | Minimum value | Nominal value | Maximum value | Unit |
Dimension |
Length | 5.9 | 6 | 6.1 | mm |
| Wide | 3.9 | 4 | 4.1 | mm | |
| Height | 1.496 | 1.546 | 1.596 | mm | |
| Environmental Adaptability | Condition | Minimum value | Nominal value | Maximum value | Unit |
| Operating Temperature (Operating Junction Temperature) | -40 | 125 | ºC | ||
| High temperature storage (ambient temperature) | +125ºC , 48h | 125 | ºC | ||
| High temperature working (ambient temperature) | +85ºC , 24h; Input low pressure, standard pressure, high pressure each 8h; |
85 | ºC | ||
| Low temperature storage (ambient temperature) | -55ºC , 24h | -55 | ºC | ||
| Low temperature working (ambient temperature) | -40ºC , 24h; Input low pressure, standard pressure, high pressure each 8h |
-40 | ºC | ||
| Damp heat | High temperature and high humidity stage: 60ºC , 95%; Low temperature and high humidity stage: 30ºC , 95%; 10 cycles, each cycle is 24h | 30 |
60 |
ºC | |
| Temperature shock | High temperature 125 ºC, low temperature -55 ºC, high and low temperature for an hour for a cycle, a total of 32 test cycles | -55 | 125 | ºC |
I. About Our Company & Products
Q: How long has your company been in business? Do you have certifications?
A: Established in 2001 for importation and exportation, we have over 24 years of industry experience. Our mother company Nationstar was established in 1969. We are certified with ISO, CE, RoHS, AEO, etc. and comply with international quality standards.
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A: MOQ varies by product, typically starting at 100pcs. For smaller orders or custom requests, please contact us for flexible solutions.
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A: Yes! We specialize in customizing products, packaging, and branding. Share your requirements, and our team will deliver tailored solutions.
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A: We offer sea freight, air freight, and express delivery (DHL, FedEx, etc.). Costs are based on weight, volume, and destination. FOB or CIF terms available.
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IV. Quality & After-Sales
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