MAX17244ETESB+ by Analog Devices

3.5V–36V, 2.5A, Synchronous Buck Converter With 28μA Quiescent Current and Reduced EMI

Status: Active
Series: MAX17244
RoHS: Unknown
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The MAX17244 high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 3.5V to 36V input voltage range with 42V input transient protection. The device can operate in dropout condition by running at 98% duty cycle. This converter delivers up to 2.5A and generates fixed output voltages of 3.3V/5V, along with the ability to program the output voltage between 1V to 10V. The MAX17244 uses a current-mode control architecture. The device can operate in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. Under light-load applications, the external sync pin FSYNC logic input allows the device to operate either in PFM mode for reduced current consumption or fixed-frequency FPWM (forced-PWM) mode to eliminate frequency variation to minimize EMI. Fixed-frequency FPWM mode is extremely useful for power supplies designed for RF transceivers where tight emission control is necessary. This device is available in a compact 16-pin (5mm x 5mm) TQFN package with exposed pad and 16-pin TSSOP. -40°C to +85°C operation.

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Features

Eliminates External Components and Reduces Total Cost Integrated High-Side and Low-Side Switch Enables Synchronous Operation for High Efficiency and Reduced Cost All-Ceramic Capacitor Solution Allows Ultra-Compact Solution Size 220kHz to 2.2MHz Adjustable Frequency with External Synchronization Power Good Output and High-Voltage EN Input Simplify Power Sequencing
Integrated High-Side and Low-Side Switch Enables Synchronous Operation for High Efficiency and Reduced Cost
All-Ceramic Capacitor Solution Allows Ultra-Compact Solution Size
220kHz to 2.2MHz Adjustable Frequency with External Synchronization
Power Good Output and High-Voltage EN Input Simplify Power Sequencing
Increases Design Flexibility 180°Out-of-Phase Clock Output at SYNCOUT Enables Cascaded Power Supplies for Increased Power Output Fixed Output Voltage with ±2% Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V)
180°Out-of-Phase Clock Output at SYNCOUT Enables Cascaded Power Supplies for Increased Power Output
Fixed Output Voltage with ±2% Accuracy (5V/3.3V) or Externally Resistor Adjustable (1V to 10V)
Reduces Power Dissipation >90% Peak Efficiency PWM and PFM Operation Optimizes Conversion Efficiency From Heavy to Light Loads Automatic LX Slew-Rate Adjustment for Optimum Efficiency Across Operating Frequency Range Low 5µA (typ.) Shutdown Current Low 28µA (typ.) Quiescent Current
>90% Peak Efficiency
PWM and PFM Operation Optimizes Conversion Efficiency From Heavy to Light Loads
Automatic LX Slew-Rate Adjustment for Optimum Efficiency Across Operating Frequency Range
Low 5µA (typ.) Shutdown Current
Low 28µA (typ.) Quiescent Current
Operates Reliably 42V Input Voltage Transient Protection Fixed 8ms Internal Software Start Reduces Input Inrush Current Cycle-by-Cycle Current Limit, Thermal Shutdown with Automatic Recovery Reduced EMI Emission with Spread-Spectrum Control
42V Input Voltage Transient Protection
Fixed 8ms Internal Software Start Reduces Input Inrush Current
Cycle-by-Cycle Current Limit, Thermal Shutdown with Automatic Recovery
Reduced EMI Emission with Spread-Spectrum Control

Specifications

VIN (V) (min) 3.5
VIN (V) (max) 42
VOUT1 (V) (min) 1
VOUT1 (V) (max) 10
IOUT1 (A) (max) 2.5
Switch Type Internal
Preset VOUT (V) 5
Output Adjust. Method PresetResistor
Power Good Signal Yes
# DC-DC Outputs 1
Switching Frequency (kHz) 2002200
Design Tools EE-Sim
Package/Pins TQFN-CU/16
BudgetaryPrice (See Notes) 2.84


MAX17244ETESB+ Semiconductors - ICs by Analog Devices

DC/DC CONV SYNC BUCK 2.2MHZ TQFN-16

Status: Unknown
Series: MAX17244 Series
RoHS: Unknown
View Datasheet Manufacturer Site View Pricing & Stock

The MAX17244 high-efficiency, synchronous step-down DC-DC converter with integrated MOSFETs operates over a 3.5V to 36V input voltage range with 42V input transient protection. The device can operate in dropout condition by running at 98% duty cycle. This converter delivers up to 2.5A and generates fixed output voltages of 3.3V/5V, along with the ability to program the output voltage between 1V to 10V. The MAX17244 uses a current-mode control architecture. The device can operate in the pulse-width modulation (PWM) or pulse-frequency modulation (PFM) control schemes. PWM operation provides constant frequency operation at all loads, and is useful in applications sensitive to switching frequency. PFM operation disables negative inductor current and additionally skips pulses at light loads for high efficiency. Under light-load applications, the external sync pin FSYNC logic input allows the device to operate either in PFM mode for reduced current consumption or fixed-frequency FPWM (forced-PWM) mode to eliminate frequency variation to minimize EMI. Fixed-frequency FPWM mode is extremely useful for power supplies designed for RF transceivers where tight emission control is necessary. This device is available in a compact 16-pin (5mm x 5mm) TQFN package with exposed pad and 16-pin TSSOP. -40°C to +85°C operation.

Specifications

Topology Synchronous Buck (Step Down)
Input Voltage Min 3.5V
Input Voltage Max 36V
DC / DC Converter IC Case TQFN
No. of Pins 16Pins
Output Current 2.5A
Output Voltage Nom. 3.3V
Switching Frequency 2.2MHz
Operating Temperature Max 85°C
Product Range MAX17244 Series
Automotive Qualification Standard -
RoHS Phthalates Compliant To Be Advised
MSL MSL 1 - Unlimited
SVHC No SVHC (15-Jan-2018)

Alternative Descriptions

DC/DC CONV, SYNC BUCK, 2.2MHZ, TQFN-16 | Farnell
Dc/Dc Conv, Sync Buck, 2.2Mhz, Tqfn-16 | Newark Electronics

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This part has not been flagged as RoHS Compliant.

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