MAX15059
76V, 300mW Boost Converter and Current Monitor for APD Bias Applications
High-Voltage Boost Converter and Current Monitor Reduce Cost and Board Space for Avalanche Photo-Diode Applications
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The constant-frequency (400kHz) current-mode PWM architecture provides low-noise-output voltage that is easy to filter. A high-voltage internal power MOSFET allows this device to boost output voltages up to 76V. Internal soft-start circuitry limits the input current when the boost converter starts. The MAX15059 features a shutdown mode to save power.
The MAX15059 includes a current monitor with more than three decades of dynamic range and monitors current ranging from 500nA to 4mA with high accuracy. Resistor-adjustable current limiting protects the APD from optical power transients. A clamp diode protects the monitor's output from overvoltage conditions. Other protection features include cycle-by-cycle current limiting of the boost converter switch, undervoltage lockout (UVLO), and thermal shutdown if the die temperature reaches +125°C.
The MAX15059 is available in a thermally enhanced, lead-free, 16-pin TQFN-EP package and operates over the -40°C to +125°C temperature range.
Key Features
- Input Voltage Range: +2.8V to +5.5V
- Wide Output-Voltage Range from (VIN + 5V) to 76V
- Internal 1Ω (typ) 80V MOSFET
- Boost Converter Output Power: 300mW
- 200mW Version Available for Smaller Inductor
- Accurate ±5% (1:1 and 5:1) High-Side Current Monitor
- Resistor-Adjustable Ultra-Fast APD Current Limit (1µs Response Time)
- Open-Drain Current-Limit Indicator Flag
- 400kHz Fixed-Switching Frequency
- Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications
- Internal Soft-Start
- 2µA (max) Shutdown Current
- -40°C to +125°C Temperature Range
- Small, Thermally Enhanced, 3mm x 3mm, Lead-Free, 16-Pin TQFN-EP Package
Applications/Uses
- Avalanche Photodiode Biasing and Monitoring
- FBON Modules
- GPON Modules
- Low-Noise Varactor Diode Bias Supply
- PIN Diode Bias Supply
| VIN (V) (min) | 2.8 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 8 |
| VOUT1 (V) (max) | 76 |
| IOUT1 (A) (max) | 0.005 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor Voltage |
| ICC (mA) (typ) | 0.6 |
| Shutdown Mode Supply Current (µA) (typ) | 0.003 |
| Shutdown Mode Supply Current (µA) (max) | 2 |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 400 |
| Package/Pins | TQFN/16 |
| Budgetary Price (See Notes) | $1.97 @1k |
Technical Docs
| Data Sheet | 76V, 300mW Boost Converter and Current Monitor for APD Bias Applications | Jan 06, 2021 | |
| Tutorial | Regulator Topologies for Battery-Powered Systems |
Click any title below to view the detail page where available.
Description
The MAX15059 evaluation kit (EV kit) demonstrates the MAX15059 APD biasing pulse-width modulation (PWM) step-up DC-DC converter with an internal power switch, current monitor, and adjustable current limiting. The step-up converter switches at 400kHz. The EV kit operates from a DC supply voltage of 2.8V to 5.5V and is configured to deliver approximately 70V, and 0 to 4mA of current at the output. The output voltage can be configured from VIN + 5V to 76V by replacing a resistor or adjusting the CNTRL voltage. The EV kit demonstrates the IC's APD fast current-limit, undervoltage-lockout (UVLO), and thermal-shutdown features.
The EV kit also features an APD input load-simulator circuit for current monitoring and step-response measurements.
The EV kit comes with the MAX15059AETE+ installed, but can also be used to evaluate the MAX15059BETE+.
Warning: Voltages exceeding 42V may exist on the VOUT, APD, MOUT, and PGND PCB pads.
Features
- 2.8V to 5.5V Supply Voltage Range
- 70V Output Voltage (Approximate)
- 0 to 4mA Output Current
- Demonstrates APD Fast Current Limit
- Demonstrates Undervoltage Lockout
- Demonstrates Thermal-Shutdown Feature
- MOUT Output Overvoltage Protection Through Clamping Circuit
- Fully Assembled and Tested
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
Parameters
| VIN (V) (min) | 2.8 |
| VIN (V) (max) | 5.5 |
| VOUT1 (V) (min) | 8 |
| VOUT1 (V) (max) | 76 |
| IOUT1 (A) (max) | 0.005 |
| Switch Type | Internal |
| Output Adjust. Method | Resistor Voltage |
| ICC (mA) (typ) | 0.6 |
| Shutdown Mode Supply Current (µA) (typ) | 0.003 |
| Shutdown Mode Supply Current (µA) (max) | 2 |
| # DC-DC Outputs | 1 |
| Switching Frequency (kHz) | 400 |
| Package/Pins | TQFN/16 |
| Budgetary Price (See Notes) | $1.97 @1k |
Key Features
- Input Voltage Range: +2.8V to +5.5V
- Wide Output-Voltage Range from (VIN + 5V) to 76V
- Internal 1Ω (typ) 80V MOSFET
- Boost Converter Output Power: 300mW
- 200mW Version Available for Smaller Inductor
- Accurate ±5% (1:1 and 5:1) High-Side Current Monitor
- Resistor-Adjustable Ultra-Fast APD Current Limit (1µs Response Time)
- Open-Drain Current-Limit Indicator Flag
- 400kHz Fixed-Switching Frequency
- Constant PWM Frequency Provides Easy Filtering in Low-Noise Applications
- Internal Soft-Start
- 2µA (max) Shutdown Current
- -40°C to +125°C Temperature Range
- Small, Thermally Enhanced, 3mm x 3mm, Lead-Free, 16-Pin TQFN-EP Package
Applications/Uses
- Avalanche Photodiode Biasing and Monitoring
- FBON Modules
- GPON Modules
- Low-Noise Varactor Diode Bias Supply
- PIN Diode Bias Supply
Description
The constant-frequency (400kHz) current-mode PWM architecture provides low-noise-output voltage that is easy to filter. A high-voltage internal power MOSFET allows this device to boost output voltages up to 76V. Internal soft-start circuitry limits the input current when the boost converter starts. The MAX15059 features a shutdown mode to save power.
The MAX15059 includes a current monitor with more than three decades of dynamic range and monitors current ranging from 500nA to 4mA with high accuracy. Resistor-adjustable current limiting protects the APD from optical power transients. A clamp diode protects the monitor's output from overvoltage conditions. Other protection features include cycle-by-cycle current limiting of the boost converter switch, undervoltage lockout (UVLO), and thermal shutdown if the die temperature reaches +125°C.
The MAX15059 is available in a thermally enhanced, lead-free, 16-pin TQFN-EP package and operates over the -40°C to +125°C temperature range.
Technical Docs
| Data Sheet | 76V, 300mW Boost Converter and Current Monitor for APD Bias Applications | Jan 06, 2021 | |
| Tutorial | Regulator Topologies for Battery-Powered Systems |
Support & Training
Search our knowledge base for answers to your technical questions.
Filtered SearchOur dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal
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