Allegro MicroSystems Inc. Ultra Low Iq, Wide Input, 2.4Mhz, 1A Synchronous Buck Regulator ARG81800KESJSR

Description
The ARG81800 includes all the control and protection circuitry to produce a PWM regulator with ±1.5% output voltage accuracy, with ultralow quiescent current to enable “keepalive” supply operation with minimal current draw from the supply during very light load regulation. There are two versions of the ARG81800 available, 500 mA and 1 A, so the physical size of the power components can be optimized for lower current systems, thus reducing PCB area and saving cost. PWM switching frequency can be programmed over a wide range to balance efficiency, component sizing, and EMC performance. If VIN decays and the duty cycle reaches its maximum, the ARG81800 will automatically fold back its PWM frequency to extend the duty cycle and maintain VOUT. The ARG81800 employs Low-Power (LP) mode to maintain the output voltage at no load or very light load conditions while drawing only micro-amps from VIN. The ARG81800 includes a PWM/AUTO control pin so the system can dynamically force either PWM or AUTO mode by setting this pin high or low, respectively. If the SYNCIN pin is driven by an external clock, the ARG81800 will be forced into PWM mode and synchronize to the incoming clock. The ARG81800 adds frequency dithering to the SYNCIN clock to reduce EMI/EMC. The ARG81800 provides a CLKOUT pin so “downstream” regulators can be easily interleaved and dithered via their synchronization inputs. The ARG81800 has external compensation, so it can be tuned to satisfy a wide range of system goals with many different external components over a wide range of PWM frequencies. The ARG81800 includes adjustable soft start to minimize inrush current. The ARG81800 monitors the feedback voltage to provide an open-drain power good signal. The Enable input can command an ultra-low current shutdown mode with VOUT = 0 V. Extensive protection features of the ARG81800 include pulse-by-pulse current limit, hiccup mode short circuit protection, BOOT open/short voltage protection, VIN undervoltage lockout, VOUT overvoltage protection, and thermal shutdown. The ARG81800 is supplied in a low profile 20-pin wettable flank QFN package (suffix “ES”) with exposed power pad.
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Suppliers

Company
Product
Description
Supplier Links
Ultra Low Iq, Wide Input, 2.4Mhz, 1A Synchronous Buck Regulator - ARG81800KESJSR - Allegro MicroSystems Inc.
Manchester, NH, United States
Ultra Low Iq, Wide Input, 2.4Mhz, 1A Synchronous Buck Regulator
ARG81800KESJSR
Ultra Low Iq, Wide Input, 2.4Mhz, 1A Synchronous Buck Regulator ARG81800KESJSR
The ARG81800 includes all the control and protection circuitry to produce a PWM regulator with ±1.5% output voltage accuracy, with ultralow quiescent current to enable “keepalive” supply operation with minimal current draw from the supply during very light load regulation. There are two versions of the ARG81800 available, 500 mA and 1 A, so the physical size of the power components can be optimized for lower current systems, thus reducing PCB area and saving cost. PWM switching frequency can be programmed over a wide range to balance efficiency, component sizing, and EMC performance. If VIN decays and the duty cycle reaches its maximum, the ARG81800 will automatically fold back its PWM frequency to extend the duty cycle and maintain VOUT. The ARG81800 employs Low-Power (LP) mode to maintain the output voltage at no load or very light load conditions while drawing only micro-amps from VIN. The ARG81800 includes a PWM/AUTO control pin so the system can dynamically force either PWM or AUTO mode by setting this pin high or low, respectively. If the SYNCIN pin is driven by an external clock, the ARG81800 will be forced into PWM mode and synchronize to the incoming clock. The ARG81800 adds frequency dithering to the SYNCIN clock to reduce EMI/EMC. The ARG81800 provides a CLKOUT pin so “downstream” regulators can be easily interleaved and dithered via their synchronization inputs. The ARG81800 has external compensation, so it can be tuned to satisfy a wide range of system goals with many different external components over a wide range of PWM frequencies. The ARG81800 includes adjustable soft start to minimize inrush current. The ARG81800 monitors the feedback voltage to provide an open-drain power good signal. The Enable input can command an ultra-low current shutdown mode with VOUT = 0 V. Extensive protection features of the ARG81800 include pulse-by-pulse current limit, hiccup mode short circuit protection, BOOT open/short voltage protection, VIN undervoltage lockout, VOUT overvoltage protection, and thermal shutdown. The ARG81800 is supplied in a low profile 20-pin wettable flank QFN package (suffix “ES”) with exposed power pad.

The ARG81800 includes all the control and protection circuitry to produce a PWM regulator with ±1.5% output voltage accuracy, with ultralow quiescent current to enable “keepalive” supply operation with minimal current draw from the supply during very light load regulation. There are two versions of the ARG81800 available, 500 mA and 1 A, so the physical size of the power components can be optimized for lower current systems, thus reducing PCB area and saving cost. PWM switching frequency can be programmed over a wide range to balance efficiency, component sizing, and EMC performance. If VIN decays and the duty cycle reaches its maximum, the ARG81800 will automatically fold back its PWM frequency to extend the duty cycle and maintain VOUT.

The ARG81800 employs Low-Power (LP) mode to maintain the output voltage at no load or very light load conditions while drawing only micro-amps from VIN. The ARG81800 includes a PWM/AUTO control pin so the system can dynamically force either PWM or AUTO mode by setting this pin high or low, respectively.

If the SYNCIN pin is driven by an external clock, the ARG81800 will be forced into PWM mode and synchronize to the incoming clock. The ARG81800 adds frequency dithering to the SYNCIN clock to reduce EMI/EMC. The ARG81800 provides a CLKOUT pin so “downstream” regulators can be easily interleaved and dithered via their synchronization inputs.

The ARG81800 has external compensation, so it can be tuned to satisfy a wide range of system goals with many different external components over a wide range of PWM frequencies. The ARG81800 includes adjustable soft start to minimize inrush current. The ARG81800 monitors the feedback voltage to provide an open-drain power good signal. The Enable input can command an ultra-low current shutdown mode with VOUT = 0 V.

Extensive protection features of the ARG81800 include pulse-by-pulse current limit, hiccup mode short circuit protection, BOOT open/short voltage protection, VIN undervoltage lockout, VOUT overvoltage protection, and thermal shutdown. The ARG81800 is supplied in a low profile 20-pin wettable flank QFN package (suffix “ES”) with exposed power pad.

Supplier's Site Datasheet
Yishun, Singapore
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators
1346997-ARG81800KESJSR
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators 1346997-ARG81800KESJSR
Win Source Part Number: 1346997-ARG81800KESJ SR Category: Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators Series: Automotive, AEC-Q100 Package: Tape & Reel Standard Package: 6,000 Current - Output: 1A Output Type: Adjustable Function: Step-Down Topology: Buck Frequency - Switching: 250kHz ~ 2.4MHz Voltage - Output (Max): 36V Number of Outputs: 1 Output Configuration: Positive Voltage - Input (Min): 3.5V Voltage - Input (Max): 36V Voltage - Output (Min/Fixed): 0.8V Synchronous Rectifier: Yes Mounting Type: Surface Mount, Wettable Flank Package / Case: 20-WFQFN Exposed Pad Supplier Device Package: 20-QFN (4x4) Temperature Range - Operating: -40°C ~ 150°C (TJ) ECCN: EAR99 Fake Threat In the Open Market: 49 pct. MSL Level: 2 (1 Year) REACH Status: REACH Unaffected HTSUS: 8542.39.0001 Mfr: Allegro MicroSystems Base Product Number: ARG818

Win Source Part Number: 1346997-ARG81800KESJSR
Category: Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators
Series: Automotive, AEC-Q100
Package: Tape & Reel
Standard Package: 6,000
Current - Output: 1A
Output Type: Adjustable
Function: Step-Down
Topology: Buck
Frequency - Switching: 250kHz ~ 2.4MHz
Voltage - Output (Max): 36V
Number of Outputs: 1
Output Configuration: Positive
Voltage - Input (Min): 3.5V
Voltage - Input (Max): 36V
Voltage - Output (Min/Fixed): 0.8V
Synchronous Rectifier: Yes
Mounting Type: Surface Mount, Wettable Flank
Package / Case: 20-WFQFN Exposed Pad
Supplier Device Package: 20-QFN (4x4)
Temperature Range - Operating: -40°C ~ 150°C (TJ)
ECCN: EAR99
Fake Threat In the Open Market: 49 pct.
MSL Level: 2 (1 Year)
REACH Status: REACH Unaffected
HTSUS: 8542.39.0001
Mfr: Allegro MicroSystems
Base Product Number: ARG818

Supplier's Site Datasheet
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators - ARG81800KESJSR - Shenzhen Shengyu Electronics Technology Limited
Futian, China
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators
ARG81800KESJSR
Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators ARG81800KESJSR
IC REG BUCK ADJ 1A 20QFN

IC REG BUCK ADJ 1A 20QFN

Supplier's Site
Voltage Regulators - DC DC Switching Regulators - ARG81800KESJSR - Quarktwin Technology Ltd.
Shenzhen, Guangdong, China
Voltage Regulators - DC DC Switching Regulators
ARG81800KESJSR
Voltage Regulators - DC DC Switching Regulators ARG81800KESJSR
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-ARG81800KESJSRTR-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-ARG81800KESJSRTR-ND
Voltage Regulators - DC DC Switching Regulators 620-ARG81800KESJSRTR-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-ARG81800KESJSRDKR-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-ARG81800KESJSRDKR-ND
Voltage Regulators - DC DC Switching Regulators 620-ARG81800KESJSRDKR-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Supplier's Site Datasheet
Voltage Regulators - DC DC Switching Regulators - 620-ARG81800KESJSRCT-ND - DigiKey
Thief River Falls, MN, United States
Voltage Regulators - DC DC Switching Regulators
620-ARG81800KESJSRCT-ND
Voltage Regulators - DC DC Switching Regulators 620-ARG81800KESJSRCT-ND
Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Buck Switching Regulator IC Positive Adjustable 0.8V 1 Output 1A 20-WFQFN Exposed Pad

Supplier's Site Datasheet
 - ARG81800KESJSR - Rochester Electronics
Newburyport, MA, United States
ARG81800 - 40 V, 500 mA / 1.0 A Synchronous Buck Regulators with Ultralow Quiescent Current, SYNCIN, CLKOUT, and PGOOD

ARG81800 - 40 V, 500 mA / 1.0 A Synchronous Buck Regulators with Ultralow Quiescent Current, SYNCIN, CLKOUT, and PGOOD

Supplier's Site Datasheet
PMIC - Voltage Regulators - DC DC Switching Regulators - ARG81800KESJSR - Lingto Electronic Limited
Shenzhen, China
PMIC - Voltage Regulators - DC DC Switching Regulators
ARG81800KESJSR
PMIC - Voltage Regulators - DC DC Switching Regulators ARG81800KESJSR
ULTRA LOW IQ, WIDE INPUT, 2.4MHZ

ULTRA LOW IQ, WIDE INPUT, 2.4MHZ

Supplier's Site Datasheet

Technical Specifications

  Allegro MicroSystems Inc. Win Source Electronics Shenzhen Shengyu Electronics Technology Limited Quarktwin Technology Ltd. DigiKey Rochester Electronics Lingto Electronic Limited
Product Category IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Switching Voltage Regulators IC Voltage Regulators IC Switching Voltage Regulators
Product Number ARG81800KESJSR 1346997-ARG81800KESJSR ARG81800KESJSR ARG81800KESJSR 620-ARG81800KESJSRTR-ND ARG81800KESJSR ARG81800KESJSR
Product Name Ultra Low Iq, Wide Input, 2.4Mhz, 1A Synchronous Buck Regulator Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators Integrated Circuits (ICs) - Power Management (PMIC) - Voltage Regulators - DC DC Switching Regulators Voltage Regulators - DC DC Switching Regulators Voltage Regulators - DC DC Switching Regulators PMIC - Voltage Regulators - DC DC Switching Regulators
Package Type Other; 20-Pin QFN Other; Tape & Reel Other; 20-WFQFN Exposed Pad Other; 20-WFQFN Exposed Pad Other; QFN20
Configuration / Function Buck Buck
Output Voltage Type Adjustable / Variable; Adjustable Adjustable / Variable; Adjustable Adjustable / Variable
Special Features Multiple Outputs; Synchronous Rectification Synchronous Rectification
fsw 250 to 2400 kHz 250 to 2400 kHz 250 to 2400 kHz 250 to 2400 kHz 250 to 2400 kHz
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