Analog Devices Inc. LT1510-5CGN#TRPBF

Overview

LT1510-5CGN#TRPBF from Analog Devices (formerly Linear Technology) is a constant-voltage/constant-current switching battery charger IC optimized for lithium-ion, NiMH, and NiCd batteries. It integrates a 1.5A DC/2A peak internal NPN switch, 0.1Ω onboard current-sense resistor, and precision 0.5% voltage reference. Operating at 500kHz switching frequency, it enables compact, high-efficiency (>87% at 1.3A) charging solutions for portable electronics such as smartphones and medical handhelds.

For engineers reviewing the LT1510-5CGN#TRPBF datasheet, LT1510-5CGN#TRPBF pinout, LT1510-5CGN#TRPBF application, or LT1510-5CGN#TRPBF equivalent, key selection criteria include its 500kHz fixed-frequency current-mode PWM architecture, ground-referenced current sensing capability, ±1% OVP accuracy over temperature, and thermal-limited 1.5A max charging current in the 16-pin GN package with θ_JA = 80°C/W.

Technical Context

The LT1510-5CGN#TRPBF implements a current-mode PWM buck converter with dual-loop control: CA1 amplifies voltage across the internal 0.1Ω sense resistor to generate IPROG (500µA/A), while CA2 compares IPROG against PROG-pin programming current to regulate battery current. The 2.465V reference feeds both the OVP amplifier (for CV mode) and PROG biasing, enabling accurate float voltage setting via external R3/R4 divider.

Its 500kHz oscillator reduces inductor size versus the 200kHz LT1510 variant; the BOOST pin drives the internal NPN switch into saturation, minimizing on-resistance (0.3–0.5Ω) and conduction loss. Shutdown is achieved by pulling VC below 0.6V, reducing quiescent current to 3µA in sleep mode when VCC is disconnected.

Key Specifications

Pinout & Package

LT1510-5CGN#TRPBF is housed in a 16-lead plastic SSOP (GN) package with fused corner pins connected to the die attach paddle for enhanced thermal performance (θ_JA = 80°C/W). PCB land pattern must expand these four corner pads to maximize heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar battery charger applications.

Compared with LTC4002-5 and TPS65023B, the LT1510-5CGN#TRPBF delivers superior thermal efficiency in compact SSOP packaging, supports broader input voltage (8–28V), and achieves tighter CV regulation (±1% vs. ±1.5%)-making it optimal for space-constrained, adapter-powered consumer and medical chargers where integration depth is secondary to precision and simplicity.

Availability

LT1510-5CGN#TRPBF is available at Aetrix Electronics and suitable for smartphone battery charging, medical handheld power management, industrial IoT sensor node recharging, and cordless power tool battery packs requiring stable component supply and long-term lifecycle support.

Supply support for LT1510-5CGN#TRPBF 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. (ADI) acquired Linear Technology in 2017 and maintains full product support, documentation, and manufacturing continuity for all Linear-branded parts including the LT1510 family.

The LT1510 product line was designed specifically for high-efficiency, integrated switching battery chargers targeting portable electronics-emphasizing minimal external components, precise voltage/current regulation, and robust thermal performance in surface-mount packages.

FAQ

What is the maximum battery voltage supported by the LT1510-5CGN#TRPBF?

The LT1510-5CGN#TRPBF supports battery voltages from 2V to 20V. Its maximum V_BAT with the switch ON is limited to V_CC – 2V, and the OVP amplifier can accurately monitor up to 20V via external resistor dividers. This makes LT1510-5CGN#TRPBF suitable for single-cell to 5-cell Li-Ion stacks or multi-cell NiMH/NiCd packs.

How does the LT1510-5CGN#TRPBF achieve constant-voltage regulation for lithium-ion batteries?

The LT1510-5CGN#TRPBF uses an internal 2.465V precision reference (±0.5% at 25°C) fed into the OVP amplifier. An external resistor divider (R3/R4) scales battery voltage to match this reference; when the scaled voltage reaches 2.465V, the VA amplifier reduces charging current to maintain constant float voltage. This closed-loop CV control is integral to LT1510-5CGN#TRPBF operation.

Can the LT1510-5CGN#TRPBF be used without an external current-sense resistor?

Yes-the LT1510-5CGN#TRPBF includes an internal 0.1Ω sense resistor between SENSE and BAT pins, eliminating the need for an external component. Current is programmed solely by the resistor (R_PROG) from PROG to GND, with accuracy maintained at ±3% typical. This integrated sensing is a core feature of LT1510-5CGN#TRPBF that simplifies design and improves reliability.

What thermal considerations apply to the LT1510-5CGN#TRPBF in the GN package?

The LT1510-5CGN#TRPBF GN package has θ_JA = 80°C/W. To avoid exceeding the 125°C max junction temperature, PCB layout must connect the four fused corner pins (1, 4, 13, 16) to expanded copper lands tied to internal ground planes. Derating curves show max charging current drops from 1.5A at 60°C ambient to ~0.9A at 85°C-critical for LT1510-5CGN#TRPBF in sealed enclosures.

Is the LT1510-5CGN#TRPBF pin-compatible with the standard LT1510?

No-LT1510-5CGN#TRPBF is not pin-compatible with the base LT1510. While both share the same GN package footprint, the LT1510-5 variant replaces the NC pin (Pin 6) with OVP functionality, whereas the standard LT1510 uses Pin 6 as NC. This difference requires separate PCB layouts; LT1510-5CGN#TRPBF is a distinct variant optimized for 500kHz operation and integrated OVP monitoring.