STMicroelectronics LDBL20D-12R

Overview

LDBL20D-12R from STMicroelectronics is a 1.2 V fixed-output, 200 mA ultra-low-dropout linear regulator in a 0.47 × 0.47 mm² STSTAMP™ package, featuring 200 mV typical dropout at 200 mA, ±1.5% output voltage accuracy at 25 °C, and 20 µA typical quiescent current at no load - optimized for space-constrained, battery-powered portable devices such as wearables and digital still cameras.

For engineers reviewing the LDBL20D-12R datasheet, LDBL20D-12R pinout, LDBL20D-12R application, or LDBL20D-12R equivalent, this page delivers verified electrical specs, thermal performance data, soft-start timing (100 µs), EN-controlled shutdown (<0.2 µA standby), and ceramic-capacitor stability guidance (0.47 µF min COUT) - all critical for low-noise, high-PSRR power rail design in mobile and IoT edge nodes.

Technical Context

The LDBL20D-12R integrates a bandgap reference, error amplifier, and internal PMOS pass transistor with logic-controlled enable input (EN pin). Its architecture supports stable regulation down to 1.5 V input while maintaining 200 mV dropout at full 200 mA load - enabled by low-R_DS(on) pass element and precision feedback loop.

It includes internal soft-start (100 µs turn-on time), optional output discharge MOSFET (enabled in -D suffix variants), and dual protection: constant-current limiting and thermal shutdown at 160 °C with 20 °C hysteresis - ensuring robust operation across -40 °C to +125 °C junction temperature range.

Key Specifications

Pinout & Package

Package: STSTAMP™ (0.47 × 0.47) mm², 4-pin wafer-level chip-scale package (WLCSP) with non-solder-mask-defined pads, 0.200 mm pitch, and bottom-side terminal marking.

Key Features

Applications

Equivalent & Alternatives

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

Compared with LDBL20D-12R, the XC6219B122MR-G saves 19 µA quiescent current but forfeits system-level control and safety; the RP111N121D-TR-F matches current capability and adds diagnostics but trades off PSRR and discharge functionality - making LDBL20D-12R the balanced choice for protected, EN-managed, low-noise portable power rails.

Availability

LDBL20D-12R is available at Aetrix Electronics and suitable for wearable health monitors, digital still cameras, tablet processors, and industrial handheld scanners requiring stable component supply, long-term lifecycle support, and AEC-Q200-aligned reliability under thermal stress.

Supply support for LDBL20D-12R 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing silicon solutions for automotive, industrial, and consumer markets since 1987.

The LDBL20 series belongs to ST's ultra-compact, ultra-low-I_Q LDO portfolio - engineered specifically for space- and energy-constrained portable electronics where miniaturization, battery longevity, and noise immunity are primary design drivers.

FAQ

What is the minimum input voltage required for stable 1.2 V output at 200 mA?

The LDBL20D-12R requires VIN ≥ VOUT + VDROP = 1.2 V + 0.2 V = 1.4 V minimum. Per datasheet Table 5, dropout is 200 mV typ. at 200 mA and 25 °C; worst-case is 350 mV over temperature, so 1.55 V input ensures regulation across full -40 °C to +125 °C range.

Can the LDBL20D-12R be used with a 0.22 µF ceramic output capacitor?

No - the datasheet specifies 0.47 µF minimum for guaranteed stability (Section 6.3 and Figure 17). While 0.22 µF may function under narrow conditions, it falls outside the stable region of the COUT–ESR plot and risks oscillation during load transients or temperature variation.

Does the "D" in LDBL20D-12R indicate presence of output discharge functionality?

Yes - per Table 7 of DS11244 Rev 3, the "D" suffix denotes inclusion of the optional output discharge MOSFET. When EN is pulled low, this internal FET actively discharges the output capacitor, preventing residual voltage from interfering with downstream logic sequencing or reset behavior.

Is the STSTAMP™ package compatible with standard reflow soldering profiles?

Yes - the device is qualified for IPC/JEDEC J-STD-020-compliant reflow, with peak temperature ≤260 °C. ST provides an ECOPACK®-recommended profile (Figure 28) specifying preheat, soak, ramp-up, and cooling phases - and mandates minimized air convection to prevent component displacement during reflow.