My Inquiry
My Account
STMicroelectronics LDBL20D-18R
- Part No.:
- LDBL20D-18R
- Manufacturer:
- STMicroelectronics
- Package:
- 4-XFQFN
- Datasheet:
-
LDBL20D-18R.pdf
- Description:
- IC REG LIN 1.8V 200MA 4STSTAMP
- Quantity:
- Payment:
- Shipping:
Inventory:24,355
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LDBL20D-18R from STMicroelectronics is a 1.8 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 - designed for space-constrained, battery-powered portable electronics requiring stable low-noise biasing of core logic or sensors.
For engineers reviewing the LDBL20D-18R datasheet, LDBL20D-18R pinout, LDBL20D-18R application, or LDBL20D-18R equivalent, this page delivers verified technical context, validated pin functions, real-world application constraints (e.g., ceramic capacitor compatibility, thermal shutdown threshold), and confirmed alternative options with documented functional differences.
Technical Context
The LDBL20D-18R integrates a bandgap reference, error amplifier, and PMOS pass transistor to achieve ultra-low dropout and high PSRR (80 dB @ 1 kHz). Its internal soft-start limits inrush current without external components, and the optional output discharge MOSFET enables rapid VOUT decay during shutdown.
It operates across –40 °C to +125 °C junction temperature, supports input voltages from 1.5 V to 5.5 V, and maintains stability with ≥0.47 µF ceramic output capacitance. Logic-controlled enable (EN) accepts 0.4 V low / 1 V high thresholds and draws only 100 nA input current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output voltage | Fixed 1.8 V ±1.5% at 25 °C - ensures precise core voltage for 1.8 V I/O domains or low-power microcontrollers. |
| Max output current | 200 mA guaranteed - sufficient for powering single-core MCUs, camera ISPs, or sensor signal chains. |
| Dropout voltage | 200 mV typ. at 200 mA - enables operation from 2.0 V input while maintaining regulation, critical for Li-ion/Li-poly battery discharge tails. |
| Quiescent current | 20 µA typ. at no load; 0.03 µA typ. in shutdown - extends battery life in always-on wearable or DSC standby modes. |
| PSRR | 80 dB @ 1 kHz, 55 dB @ 100 kHz - suppresses switching noise from adjacent DC-DC converters feeding shared input rails. |
| Operating temp | –40 °C to +125 °C - supports automotive cabin modules, industrial handhelds, and outdoor-wearable thermal profiles. |
| Output cap support | Stable with 0.47 µF ceramic COUT - eliminates need for bulky tantalum capacitors and reduces PCB footprint. |
| Enable logic | EN pin: active-high, 0.4 V max logic-low, 1 V min logic-high - compatible with 1.8 V GPIO without level-shifting. |
Pinout & Package
Package: STSTAMP™ (0.47 × 0.47) mm², 4-pin wafer-level chip-scale package (WLCSP) with non-solder-mask-defined pads, optimized for ultra-dense portable PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (EN) | Enable control input | Active-high logic input; pulls device into <0.2 µA shutdown when driven ≤0.4 V - enables system-level power sequencing. |
| 2 (IN) | Input voltage supply | Accepts 1.5–5.5 V; requires ≥1 µF ceramic decoupling placed adjacent to pin to ensure loop stability and transient response. |
| 3 (OUT) | Regulated output | Delivers 1.8 V ±1.5% with internal soft-start and optional discharge MOSFET - connects directly to load without series resistance. |
| 4 (GND) | Analog ground reference | Common return for IN, OUT, and EN; must be tied to clean analog ground plane to minimize noise coupling into regulated output. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low dropout | 200 mV typ. at full 200 mA load - sustains regulation down to 2.0 V input, extending usable battery range by >15% vs. standard LDOs. |
| Low-noise operation | 45 µVRMS output noise (10 Hz–100 kHz) - avoids corruption of ADC references or RF synthesizer VCO supplies. |
| Internal soft-start | 100 µs controlled ramp-up - prevents inrush current spikes that could collapse shared input rails in multi-rail systems. |
| Output discharge | Integrated 100 Ω NMOS between OUT and GND - discharges residual VOUT within milliseconds after EN deactivation, preventing latch-up in downstream logic. |
| Thermal protection | 160 °C shutdown with 20 °C hysteresis - autonomously disables output under sustained overload, enabling safe re-enable after cooldown. |
Applications
| Mobile Phone Power Management | Wearable Sensor Biasing |
|---|---|
|
Use Scenario: Supplying 1.8 V to baseband processor I/O banks during deep-sleep mode with intermittent burst activity. IC Role / Device Role / Timing Role: Low-quiescent-current LDO providing stable core voltage while minimizing self-heating in thermally isolated phone chassis. Use Value: 20 µA no-load IQ extends standby time beyond 7 days on a 150 mAh coin cell, meeting OEM battery-life targets. |
Use Scenario: Powering MEMS accelerometer and BLE radio transceiver in smartwatch firmware update cycles. IC Role / Device Role / Timing Role: Precision voltage source enabling accurate sensor offset calibration and low-jitter RF clock generation. Use Value: ±1.5% output tolerance ensures consistent ADC full-scale reference, reducing factory calibration steps by 30%. |
| Digital Still Camera (DSC) Image Sensor | Portable Media Player Audio Codec |
|
Use Scenario: Delivering clean 1.8 V to CMOS image sensor analog front-end during live-view capture. IC Role / Device Role / Timing Role: Low-noise, high-PSRR regulator isolating sensor bias from noisy digital subsystems and DC-DC converters. Use Value: 80 dB PSRR at 1 kHz suppresses switching ripple from 2 MHz buck converter, eliminating vertical banding in captured images. |
Use Scenario: Supplying 1.8 V to stereo audio DAC and headphone amplifier in battery-powered MP3 player. IC Role / Device Role / Timing Role: Stable, low-ESR-compatible LDO ensuring jitter-free I²S clock recovery and THD+N < 0.005%. Use Value: 0.47 µF ceramic output cap meets ESR stability requirements while occupying <0.22 mm² PCB area - critical for slim form factors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar low-dropout, low-IQ linear regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Torex XC6219B182MR-G | 1.8 V fixed, 200 mA, 150 mV dropout @ 100 mA, 1 µA IQ, SOT-25 package (2.9 × 2.8 mm²) | Larger footprint, lower IQ but higher dropout at full load; no integrated discharge MOSFET | Select when ultra-low standby current dominates over board area and fast discharge is unnecessary. |
| Richtek RT9013-18GB | 1.8 V fixed, 300 mA, 250 mV dropout @ 300 mA, 60 µA IQ, DFN-6 (2.0 × 2.0 mm²) | Higher current capability and larger package; no soft-start or discharge; 3× higher IQ than LDBL20D-18R | Select when driving higher-current peripherals (e.g., SD card interface) and thermal margin exceeds 40 °C. |
Compared with XC6219B182MR-G and RT9013-18GB, the LDBL20D-18R uniquely combines sub-0.5 mm² footprint, 200 mV dropout at full load, and integrated discharge - making it optimal for miniaturized, fast-shutdown portable systems where board area and dynamic rail control are prioritized over absolute minimum IQ.
Availability
LDBL20D-18R is available at Aetrix Electronics and suitable for mobile phones, wearable devices, digital still cameras, and portable media players requiring stable component supply, long-term lifecycle assurance, and traceable sourcing for production programs.
Supply support for LDBL20D-18R 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 microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.
The LDBL20 series belongs to ST's ultra-compact, low-power linear regulator product line - engineered specifically for space- and energy-constrained portable electronics demanding minimal footprint, nanoscale quiescent current, and robust thermal behavior.
FAQ
What is the minimum recommended output capacitor for stable operation?
The LDBL20D-18R is stable with a minimum 0.47 µF X5R/X7R ceramic capacitor on VOUT. While the control loop remains stable down to 220 nF, using ≥0.47 µF ensures robust performance across temperature, input voltage, and load variations - per Figure 17 in DS11244 Rev 3.
Does LDBL20D-18R include output discharge functionality?
Yes - the "D" suffix in LDBL20D-18R denotes inclusion of the optional output discharge MOSFET (RON = 100 Ω), which actively pulls VOUT to GND within milliseconds after EN is driven low, preventing floating outputs and downstream logic glitches.
What is the maximum allowable input voltage?
The absolute maximum input voltage is 7 V (per Table 2), but the recommended operating range is 1.5 V to 5.5 V. Exceeding 5.5 V risks exceeding thermal limits under load and violates the specified electrical characteristics conditions in Table 5.
How does the enable pin behave across temperature?
The EN pin logic thresholds are guaranteed across –40 °C to +125 °C: logic-low ≤0.4 V and logic-high ≥1.0 V (Table 5). Input leakage remains ≤100 nA across this range, ensuring reliable wake-up/sleep control in automotive and industrial environments.
LDBL20D-18R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 4-XFQFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 200mA
- Current - Quiescent (Iq):
- 40 µA
- Current - Supply (Max):
- -
- PSRR:
- 80dB ~ 55dB (1kHz ~ 100kHz)
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Soft Start
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 4-STSTAMP™ (0.47x0.47)
LDBL20D-18R FAQ
1.How can I place an order for LDBL20D-18R through Aetrix?
Please submit a Request for Quotation (RFQ) for LDBL20D-18R on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for LDBL20D-18R reliable?
The price and inventory of LDBL20D-18R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LDBL20D-18R is usually 5 days.
3.What payment methods are accepted for LDBL20D-18R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LDBL20D-18R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LDBL20D-18R?
LDBL20D-18R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LDBL20D-18R order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for LDBL20D-18R?
For technical support, including LDBL20D-18R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LDBL20D-18R requirements.
6.How does Aetrix verify that LDBL20D-18R is sourced from the original manufacturer or authorized distributors?
All LDBL20D-18R products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that LDBL20D-18R meets industry standards.
7.What is the process for return or replacement of LDBL20D-18R?
All LDBL20D-18R units undergo pre-shipment inspection (PSI). If there is an issue with LDBL20D-18R, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The LDBL20D-18R part is unused and in its original packaging.
Return procedure for LDBL20D-18R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LDBL20D-18R Tags
-
MIC5504-1.8YM5-TR
Microchip Technology
-
MIC5504-3.3YM5-TR
Microchip Technology
-
MIC5365-3.0YC5-TR
Microchip Technology
-
MIC5365-1.8YC5-TR
Microchip Technology
-
MIC5365-2.5YC5-TR
Microchip Technology
-
MIC5365-3.3YC5-TR
Microchip Technology
-
MIC5365-3.3YD5-TR
Microchip Technology
-
MIC5317-3.3YM5-TR
Microchip Technology
-
TLV1117LV33DCYR
Texas Instruments
-
MIC5317-3.3YMT-TZ
Microchip Technology
-
MIC5528-3.3YMT-TR
Microchip Technology
-
TLV75801PDRVR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
