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Switching Regulator - Switching Regulators 
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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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Key Features
Applications/Uses
Parametric specs for Step-Up Switching Regulators
| 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 |
| IQ (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) | 2.3 |
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Simplified Block Diagram
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 .
Parameters
Parametric specs for Step-Up Switching Regulators
| 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 |
| IQ (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) | 2.3 |
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 MAX15059 constant-frequency pulse-width modulating (PWM) step-up DC-DC converter features an internal switch and a high-side current monitor with high-speed adjustable current limiting. This device is capable of generating output voltages up to 76V (300mW for the MAX15059A and 200mW for the MAX15059B) and provides current monitoring up to 4mA. The MAX15059 operates from 2.8V to 5.5V.
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.
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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