HT7550-1
Manufacturer
Model
HT7550-1
Category
The HT7550-1 is a compact 150mA LDO regulator optimized for low-power applications requiring stable 5V output. Its SOT-89 package and wide operating temperature range (-40°C to +85°C) make it suitable for consumer electronics, IoT devices, and industrial systems. Key design considerations include thermal management through copper padding, short trace routing, and proper ESD protection. While cost-effective and thermally robust, its single-output design and moderate PSRR limit use in multi-rail systems. The component is ideal for applications prioritizing size and reliability over high current demands.
Reference Pricing
Reference Stock
Specifications
| Dropout Voltage | 25mV |
| Load Regulation | +/-0.6% |
| Operating Temperature Range | -40°C to 85°C |
| Output Current | 100mA |
| Output Noise | 50μVRMS |
| Output Voltage Accuracy | +/-1.0% |
| Output Voltage Regulation | +/-0.2% |
| PSRR | 60dB |
| Package Type | SOT-89 |
| Rated Voltage | 5.0V |
| Transient Response Time | 10μs |
Function And Role
Core Function
150mA fixed 5V positive output linear low drop-out (LDO) voltage regulator
Key Characteristics
- SOT-89 encapsulation
- Input voltage range: 28V
- Output voltage: 5V
- Operating temperature: -40°C to +85°C
- Low dropout voltage (typical value: 0.25V at 150mA)
Application Domains
Basic Scenarios
- Consumer electronics power supply
- IoT device power management
- Low-power communication modules
Extended Scenarios
- Medical device power systems
- Automotive electronic control units
- Industrial sensor networks
Precautions
| Soldering | Use fine pitch soldering tools and avoid thermal shock |
| Current Limit | Max continuous output current: 150mA (instantaneous peak: 300mA) |
| Voltage Limit | Input voltage range: 18-28V (absolute max: 30V) |
| Thermal Management | Thermal resistance: 62.5°C/W (TA=25°C) |
| Storage | Store in anti-static packaging below 85°C |
| Risk Warnings |
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Alternative Model Params
- Output current (150mA equivalent)
- Input voltage range (18-28V compatible)
- Package (SOT-89 form factor)
- Dropout voltage (<0.3V requirement)
Design Recommendations
| Layout | Keep input/output traces short (<5mm) and ground plane |
| Thermal | Add 10x10mm copper pad for heat dissipation |
| Compatibility | Pair with 0603 package capacitors (10μF/25V) |
| Testing | Verify ripple <50mV at 100kHz with 4A load pulse |
Market Positioning
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| Weaknesses |
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