Analog Devices Inc. DC1158A

Overview

DC1158A from Analog Devices is a demonstration circuit designed to evaluate the LTC3564 monolithic synchronous buck regulator, featuring 2.25MHz switching frequency, 2.5V–5.5V input range, 1.25A max output current, ±0.5% output voltage accuracy, and Burst Mode® operation for ultra-low-light-load efficiency in portable Li-Ion and 3.3V/5V-powered systems.

For engineers reviewing the DC1158A datasheet, DC1158A pinout, DC1158A application, or DC1158A equivalent, this page provides verified evaluation board specifications, jumper-configurable output voltages (1.2V/1.5V/1.8V), shutdown current (<1µA), measurement setup guidance, and Gerber file availability for design validation and layout reference.

Technical Context

The DC1158A implements the LTC3564 - a constant-frequency, current-mode synchronous buck controller with integrated power MOSFETs - enabling compact DC/DC conversion without external gate drivers or discrete switches. Its 2.25MHz fixed-frequency operation supports sub-2mm inductors and ceramic capacitors, while 100% duty-cycle capability ensures low-dropout regulation down to V_IN – V_OUT ≈ 0.1V.

Burst Mode® operation automatically engages below ~10mA load to reduce quiescent current to <1µA, extending battery runtime in standby; shutdown is controlled via XJP1 jumper, and output voltage is selected by shunt position on XJP2–XJP4 or resistor RFB6 for custom values.

Key Specifications

Availability

DC1158A is available at Aetrix Electronics and suitable for power management validation, Li-Ion battery system characterization, high-frequency DC/DC layout prototyping, and low-quiescent-current regulator qualification requiring stable component supply and documented test methodology.

Supply support for DC1158A includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Analog Devices, Inc. is a global semiconductor leader specializing in high-performance analog, mixed-signal, and digital signal processing technologies for precision instrumentation, power management, and signal integrity applications.

The DC1158A belongs to Analog Devices' demonstration circuit product line, engineered specifically to accelerate evaluation and adoption of the LTC3564 synchronous buck regulator in space-constrained, battery-sensitive designs.

FAQ

What is the primary function of the DC1158A demonstration circuit?

The DC1158A demonstration circuit is a fully assembled and tested evaluation platform for the LTC3564 monolithic synchronous buck regulator. It enables rapid validation of key performance metrics including efficiency, transient response, ripple, and light-load behavior under real-world conditions. The DC1158A includes onboard jumpers, test points, and layout-optimized components to replicate production-grade implementation of the DC1158A's target IC.

How do I configure the output voltage on the DC1158A?

Output voltage on the DC1158A is set using jumper shunts: XJP2 selects 1.2V, XJP3 selects 1.5V, and XJP4 selects 1.8V. For non-standard voltages, remove RFB5, populate RFB6 with appropriate resistor value, and move the shunt to JP5. All configurations maintain ±0.5% output regulation across 0–1.25A load and 2.5–5.5V input per the DC1158A Quick Start Guide.

What is the minimum input voltage required for DC1158A operation?

The DC1158A supports an input voltage range of 2.5V to 5.5V, as defined by the LTC3564's operational limits. At 2.5V input, the DC1158A maintains regulation for all configured output voltages (1.2V, 1.5V, 1.8V) up to 1.25A, leveraging 100% duty-cycle capability. Input below 2.5V may cause undervoltage lockout or unregulated output on the DC1158A.

Does the DC1158A include Gerber files for PCB replication?

Yes, Gerber files for the DC1158A are explicitly referenced in the official Quick Start Guide and are available upon request from the LTC Factory (Analog Devices). These files include complete layer stack-up, copper routing, solder mask, and silkscreen data - enabling direct replication or modification of the DC1158A layout for custom power stage integration.

How does the DC1158A achieve ultra-low shutdown current?

The DC1158A achieves <1µA shutdown current by leveraging the LTC3564's internal enable architecture: when jumper XJP1 is placed in the OFF position, the IC enters hardware-controlled shutdown mode, disabling switching and bias circuits. This specification is measured at VIN = 5V and confirmed in the DC1158A Performance Summary table - a key enabler for long-term battery storage in IoT sensor nodes using the DC1158A reference design.