Texas Instruments LM2773TLEV

Overview

LM2773TLEV from Texas Instruments is an evaluation board for the LM2773 dual-mode charge-pump DC/DC converter IC, designed to generate 1.6V or 1.8V from 2.7V–5.5V input with up to 300 mA output current. It features DSBGA-9 footprint compatibility, on-board flying capacitors (C1/C2 = 1 µF), input/output filtering (CIN = 1 µF, COUT = 4.7 µF), and configurable EN and MODE (SEL) headers for enable control and voltage selection.

For engineers reviewing the LM2773TLEV datasheet, LM2773TLEV pinout, LM2773TLEV application, or LM2773TLEV equivalent, this board enables rapid validation of the LM2773's 2/3x and 1x gain charge-pump operation, low-ripple PFM mode at light loads (<40 mA), spread-spectrum EMI reduction, and fixed-frequency pre-regulation across input voltages.

Technical Context

The LM2773TLEV implements a two-phase switched-capacitor topology using external flying capacitors C1 and C2 to transfer charge between input and output. It supports two selectable regulated output voltages-1.6V and 1.8V-via the MODE (SEL) header connection to VIN or GND.

Operation switches between 1x gain (input current ≈ load current) below ~3.3V (1.6V mode) or ~3.5V (1.8V mode), and 2/3x gain (input current ≈ 2/3 × load current) above those thresholds. Pre-regulation controls internal MOSFET gate drive to limit ripple; at <40 mA, it enters low-ripple pulse frequency modulation (PFM) mode.

Key Specifications

Availability

LM2773TLEV is available at Aetrix Electronics and suitable for power management validation, portable device power architecture prototyping, and low-noise LDO replacement evaluation requiring stable component supply and documented reference performance.

Supply support for LM2773TLEV 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

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and power management technologies, with over 90 years of innovation in high-reliability electronic components.

The LM2773 product line delivers compact, low-EMI charge-pump solutions for space-constrained applications needing dual-output-voltage flexibility without inductors - targeting portable audio, wearables, and battery-powered microcontroller systems.

FAQ

What is the primary function of the LM2773TLEV evaluation board?

The LM2773TLEV evaluation board is a fully assembled platform for testing and validating the LM2773 dual-mode charge-pump DC/DC converter. It allows engineers to verify 1.6V/1.8V output regulation, 2/3x and 1x gain transitions, PFM mode behavior below 40 mA, and spread-spectrum EMI performance using its onboard flying capacitors, input/output filters, and configurable EN/MODE headers. The LM2773TLEV simplifies bench characterization without custom PCB design.

How do I configure the LM2773TLEV for 1.6V versus 1.8V output?

To set 1.6V output on the LM2773TLEV, connect the center pin of the MODE (SEL) header to the "+" position (VIN). To select 1.8V, connect the same center pin to the "−" position (GND). This configuration directly controls the LM2773's internal feedback network as specified in SNVA310A. The LM2773TLEV provides clear silkscreen labeling and jumper positions to ensure correct setup without soldering or modification.

Does the LM2773TLEV support enable/disable functionality, and how is it implemented?

Yes, the LM2773TLEV supports hardware enable/disable via the EN header. Connecting the center pin to the ON position (VIN) asserts high on the LM2773's EN pin to activate regulation; connecting it to OFF (GND) pulls EN low to disable the device and reduce quiescent current. This implementation mirrors real-world system-level control and is electrically identical to the LM2773's specified enable threshold and response time per its datasheet.

What are the key passive components included on the LM2773TLEV board?

The LM2773TLEV includes CIN = 1 µF/10V (0402 X5R), COUT = 4.7 µF/6.3V (0603 X5R), and flying capacitors C1/C2 = 1 µF/10V (0402 X5R), all sourced from TDK per the BOM in AN-1769. These values and package sizes match TI's recommended design for optimal efficiency, ripple suppression, and thermal performance across the full 300 mA load range. No additional external passives are required to operate the LM2773TLEV.

Can the LM2773TLEV be used to evaluate EMI performance, and what feature supports this?

Yes, the LM2773TLEV enables direct measurement of EMI characteristics because the underlying LM2773 IC incorporates spread-spectrum clocking across all operating modes - including both 1x and 2/3x gain and PFM - to distribute radiated energy over a wider bandwidth. This feature is active by default and requires no configuration. Engineers can use the LM2773TLEV's clean layout and accessible test points to perform near-field scans or conducted emissions testing per CISPR standards.