Texas Instruments TPS79913DDCR

Overview

TPS79913DDCR from Texas Instruments is a 200-mA, low-quiescent-current, ultralow-noise, high-PSRR low-dropout linear regulator with fixed 1.3-V output, EN control, and 100-mV typical dropout at full load. It delivers ±2% output accuracy over –40°C to +125°C and operates stably with ≥2-μF ceramic output capacitance. It is deployed in RF power stages of wearable electronics and Bluetooth® modules where supply noise and transient response critically impact signal integrity.

For engineers reviewing the TPS79913DDCR datasheet, TPS79913DDCR pinout, TPS79913DDCR application, or TPS79913DDCR equivalent, this page provides verified package mapping (SOT-23-THIN, 5-pin), confirmed noise-reduction functionality (NR pin), validated PSRR performance (66 dB @ 1 kHz), and real-world design meaning for ground current (40 μA typ), dropout (100 mV), and output noise (13.65 μV_RMS).

Technical Context

The TPS79913DDCR employs a PMOS pass element with precision bandgap reference and high-gain error amplifier to achieve ultralow noise and high PSRR across wide input-output differentials. Its active pulldown circuit engages on >5% output overshoot during enable transitions, limiting transient excursions without external components.

Inrush current protection is implemented via immediate current-limit activation upon EN toggle, while UVLO (1.9–2.65 V) prevents erroneous startup under marginal input conditions. The NR pin enables external 0.01-μF capacitor bypassing of bandgap noise-directly reducing integrated output noise by up to 90% versus NR-open configuration.

Key Specifications

Pinout & Package

TPS79913DDCR is packaged in a 5-pin SOT-23-THIN (DDC) with body size 2.90 mm × 1.60 mm and thermal pad not present. Pinout is validated per TI SBVS056L Rev L (Fig 5-1): Pin 1 = IN, Pin 2 = GND, Pin 3 = EN, Pin 4 = NR, Pin 5 = OUT.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise LDO applications.

Compared with TPS79913DDCR, TPS79513DBVR trades noise performance for lower BOM count (no NR cap), while MCP1700T-1302E/TT sacrifices both noise control and efficiency for ultra-low cost-making TPS79913DDCR the sole option meeting RF-grade noise, fast transient, and micro-power requirements simultaneously.

Availability

TPS79913DDCR is available at Aetrix Electronics and suitable for RF power amplifiers, VCO core supplies, wearable sensor hubs, low-power BLE SoC cores, and wireless LAN front-end modules requiring stable component supply across industrial temperature range and long production lifecycles.

Supply support for TPS79913DDCR 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 leader specializing in analog and embedded processing technologies, with decades of LDO innovation focused on power integrity for high-performance systems.

The TPS799 product line was designed specifically for noise-sensitive RF and precision analog applications-including VCOs, PLLs, and high-resolution ADCs-where ultralow noise, high PSRR, and micro-power operation are mandatory.

FAQ

What is the minimum input voltage required for stable operation of the TPS79913DDCR?

The TPS79913DDCR requires VIN ≥ VOUT + VDO or 2.7 V, whichever is greater. With its 100-mV typical dropout at 200 mA, the absolute minimum input is 1.4 V-but the datasheet specifies 2.7 V as the lower bound of recommended operating conditions to ensure full parameter compliance across temperature and load. Below 2.7 V, UVLO may engage or accuracy degrades.

Can the TPS79913DDCR be used without the NR (noise reduction) capacitor?

Yes, the TPS79913DDCR functions without the NR capacitor, but output noise increases significantly-from 13.65 μV_RMS (with 0.01-μF NR cap) to approximately 122.85 μV_RMS (94 × 1.3 V). The NR pin is left floating in fixed-voltage versions when unused; no pull-down or termination is required. For RF or precision analog rails, the NR capacitor is strongly recommended.

Does the TPS79913DDCR support reverse current protection?

No, the TPS79913DDCR does not include reverse current protection. Its PMOS pass transistor contains an intrinsic body diode that conducts from OUT to IN if V_OUT > V_IN. During such reverse-bias conditions, current is unregulated and unclamped. External reverse-blocking circuitry (e.g., series Schottky diode or ideal diode controller) is required if back-driving the output is possible.

What is the thermal performance of the TPS79913DDCR in the SOT-23-THIN (DDC) package?

In the 5-pin SOT-23-THIN (DDC) package, the TPS79913DDCR has R_θJA = 225.3°C/W (junction-to-ambient) and R_θJB = 47.3°C/W (junction-to-board). With 200-mA load and 100-mV dropout, power dissipation is 20 mW-resulting in ~4.5°C junction rise above ambient on a standard 2-layer PCB. No thermal pad or heatsinking is needed for typical wearable or portable use cases.

Is the TPS79913DDCR pin-compatible with other TPS799 variants in the same package?

Yes, all TPS799 fixed-output variants (e.g., TPS79912, TPS79915, TPS79918) share identical pinout and package dimensions in the SOT-23-THIN (DDC) variant. The NR pin is present and functional across all fixed-output versions; only adjustable versions (e.g., TPS79901) replace NR with FB. This allows drop-in replacement for voltage scaling without layout changes.