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UC3843AD1 — STMicroelectronics — DC-DC Switching Controllers — product image
STMicroelectronics

STMicroelectronics UC3843AD1 DC-DC Switching Controllers

DC-DC Switching Controllers · STMicroelectronics

MPNUC3843AD1

STMicroelectronics UC3843AD1 dc-dc switching controller. Key specifications include Supply Voltage: 30 V / Rejection 12 ≤ Vi ≤ 25V (note 3) 70 70 dB; Output Voltage: T j = 25°C Io= 1mA 4.95 5.00 5.05 4.90 5.00 5.10 V; Output Current: ±1A; Resistance: Junction-ambient Max. 100 150 °C/W. Request a quote for pricing and a

Supply Voltage
30 V
Supply Voltage
Rejection 12 ≤ Vi ≤ 25V (note 3) 70 70 dB
Output Voltage
T j = 25°C Io= 1mA 4.95 5.00 5.05 4.90 5.00 5.10 V
Output Current
±1A
Resistance
Junction-ambient Max. 100 150 °C/W
Frequency
T j = 25°C 47 52 57 47 52 57 KHz
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Specifications

Core ratings and package details for this dc-dc switching controllers (UC3843AD1). Use the table below when comparing drop-in options or validating a schematic callout.

ParameterValueParameterValue
Manufacturer Part NumberUC3843AD1Temperature Range– 65 to 150 °C
ManufacturerSTMicroelectronicsOperating Temperature– 40 to 150 °C
Product TypeDC-DC switching controllerResistanceJunction-ambient Max. 100 150 °C/W
CategoryDC-DC Switching ControllersOutput VoltageT j = 25°C Io= 1mA 4.95 5.00 5.05 4.90 5.00 5.10 V
AvailabilityContact UsFrequencyT j = 25°C 47 52 57 47 52 57 KHz
PackageUC2842AD1; UC3842AD1Input VoltageV PIN1 = 2.5V 2.45 2.50 2.55 2.42 2.50 2.58 V
Supply Voltage30 VBandwidthT J = 25°C 0.7 1 0.7 1 MHz
Output Current±1ASupply VoltageRejection 12 ≤ Vi ≤ 25V (note 3) 70 70 dB
Power Dissipationat Tamb ≤ 25 °C (DIP-8) 1.25 WSupply CurrentV PIN2 = VPIN3 = 0V 12 17 12 17 mA
Power Dissipationat Tamb ≤ 25 °C (SO-8) 800 mW

Product Overview

Product narrative for the STMicroelectronics part UC3843AD1. Read this before you compare alternates or open an RFQ.

STMicroelectronics UC3843AD1 dc-dc switching controller. Key specifications include Supply Voltage: 30 V / Rejection 12 ≤ Vi ≤ 25V (note 3) 70 70 dB; Output Voltage: T j = 25°C Io= 1mA 4.95 5.00 5.05 4.90 5.00 5.10 V; Output Current: ±1A; Resistance: Junction-ambient Max. 100 150 °C/W. Request a quote for pricing and a

STMicroelectronics UC3843AD1 is a dc-dc switching controller. Key specifications include Supply Voltage: 30 V / Rejection 12 ≤ Vi ≤ 25V (note 3) 70 70 dB; Output Voltage: T j = 25°C Io= 1mA 4.95 5.00 5.05 4.90 5.00 5.10 V; Output Current: ±1A; Resistance: Junction-ambient Max. 100 150 °C/W. Request a quote for pricing and availability.

Key design considerations

  • Follow the recommended MOSFET and inductor selection tables
  • Keep the switching loop tight to limit EMI
  • Compensate according to the datasheet or reference design
  • Confirm sync/enable and UVLO thresholds

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Design Resources

Tutorial and application reading tied to UC3843AD1. These are editorial guides on this site, not manufacturer PDFs.

GUIDEUnderstanding Digital Signal Controllers (DSCs): Bridging Microcontrollers and DSPsRead guide →GUIDEHow to Choose Thermal Management Components for Compact Electronic DevicesRead guide →GUIDEVoltage Regulator Module(VRM): What It Is, How It Works, and How to Choose OneRead guide →GUIDECircuit Board Components: A Practical Guide to Identification, Functions, and LabelsRead guide →GUIDEWhat Is an Autopilot Control System? Aircraft Sensors, Actuators, and Flight Control Electronics ExplainedRead guide →GUIDEWhat Is a Parasitic Diode? Causes, Effects, and Design ConsiderationsRead guide →

Frequently Asked Questions

Short answers for sourcing UC3843AD1 from STMicroelectronics: what to confirm before you place the order.

What is UC3843AD1?

STMicroelectronics UC3843AD1 dc-dc switching controller. Key specifications include Supply Voltage: 30 V / Rejection 12 ≤ Vi ≤ 25V (note 3) 70 70 dB; Output Voltage: T j = 25°C Io= 1mA 4.95 5.00 5.05 4.90 5.00 5.10 V; Output Current: ±1A; Resistance: Junction-ambient Max. 100 150 °C/W. Request a quote for pricing and a

What package is UC3843AD1 supplied in?

UC3843AD1 is supplied in UC2842AD1; UC3842AD1 by STMicroelectronics.

What is the operating temperature range of UC3843AD1?

UC3843AD1 operating temperature is – 40 to 150 °C.

What is UC3843AD1 used for?

UC3843AD1 is typically used in Point-of-load converters, Industrial 12 V / 24 V power stages, Telecom intermediate bus, LED and motor supplies.

What are the key specifications of UC3843AD1?

Operating Temperature: – 40 to 150 °C; Manufacturer Part Number: UC3843AD1; Product Type: DC-DC switching controller; Supply Voltage: 30 V; Output Current: ±1A.

Is UC3843AD1 in stock at MOZ Electronics?

UC3843AD1 is available by quote. MOZ Electronics sources authentic parts, including hard-to-find and obsolete lots, with documented traceability.

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