Overview
The LT3507AEUHF#TRPBF is a triple monolithic step-down DC/DC converter with an integrated low dropout regulator (LDO) produced by Analog Devices Inc. This device is designed to provide high efficiency and flexibility in power management solutions. It features three current-mode switching converters and an LDO, making it suitable for a wide range of applications that require multiple voltage outputs.
Key Specifications
| Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Minimum Operating Voltage | Internal UVLO on VIN1 | 3.8 | 4 | V | |
| Input Quiescent Current | Not Switching, VBIAS = 3.3V | 2 | 3.5 | mA | |
| Bias Quiescent Current | Not Switching, VBIAS = 3.3V | 5 | 7.5 | mA | |
| Shutdown Current | VRUN1,2,3 = 0V | 1 | µA | ||
| Reference Voltage Line Regulation | 5V < VIN1 < 36V | 0.01 | %/V | ||
| Switching Frequency | RT = 40.2k | 0.9 | 1.1 | MHz | |
| Feedback Pin Voltage | 788 | 800 | 812 | mV | |
| PGOOD Output Voltage Low | IPGOOD = 200µA | 0.2 | 0.4 | V | |
| Operating Junction Temperature Range | –40°C | 125°C | °C | ||
| Storage Temperature Range | –65°C | 150°C | °C |
Key Features
- Triple monolithic step-down DC/DC converters with internal power switches.
- Integrated low dropout regulator (LDO).
- Current-mode operation with high efficiency.
- Wide input voltage range: 3.8V to 36V.
- Switching frequency adjustable up to 1.1 MHz.
- Power good (PGOOD) indicators for each output.
- Overvoltage and undervoltage lockout (OVLO and UVLO) protection.
- Compact 38-lead QFN package with exposed pad for thermal management.
Applications
The LT3507AEUHF#TRPBF is suitable for various applications requiring multiple regulated voltage outputs, such as:
- Industrial power systems.
- Telecommunication equipment.
- Automotive systems.
- Medical devices.
- High-density power supplies in consumer electronics.
Q & A
- What is the minimum operating voltage for the LT3507AEUHF#TRPBF?
The minimum operating voltage is 3.8V due to the internal UVLO on VIN1. - What is the typical input quiescent current when not switching?
The typical input quiescent current is 3.5 mA when VBIAS = 3.3V. - What is the switching frequency range of the LT3507AEUHF#TRPBF?
The switching frequency is adjustable up to 1.1 MHz with RT = 40.2k. - Does the LT3507AEUHF#TRPBF have overvoltage and undervoltage protection?
Yes, it includes overvoltage and undervoltage lockout (OVLO and UVLO) protection. - What is the operating junction temperature range for the LT3507AEUHF#TRPBF?
The operating junction temperature range is –40°C to 125°C. - What package type is the LT3507AEUHF#TRPBF available in?
The device is available in a 38-lead QFN package with an exposed pad. - Does the LT3507AEUHF#TRPBF have power good indicators?
Yes, it has power good (PGOOD) indicators for each output. - What is the feedback pin voltage range for the LT3507AEUHF#TRPBF?
The feedback pin voltage range is 788 mV to 812 mV. - How many outputs does the LT3507AEUHF#TRPBF support?
The device supports three step-down DC/DC converter outputs and one LDO output. - Is the LT3507AEUHF#TRPBF RoHS compliant?
Yes, the LT3507AEUHF#TRPBF is RoHS compliant.
