SP6205EM5-L/TR - 500mA Ultra-Low Noise CMOS LDO | MaxLinear
MPN: SP6205EM5-L/TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.66 | $0.66 |
| 10 | $0.55 | $5.50 |
| 100 | $0.42 | $42.00 |
| 500 | $0.36 | $180.00 |
| 1,000 | $0.33 | $330.00 |
| 3,000 | $0.3 | $900.00 |
SP6205EM5-L/TR Overview
An LDO (Low-Dropout) linear regulator is a type of voltage regulator that maintains a stable, low-ripple output voltage even when the input-to-output voltage differential is small, typically below 1 V. LDOs sit in the power management IC hierarchy as a sub-class of linear regulators, which in turn are categorized with switching regulators (buck/boost) and charge pumps under the broader voltage-regulator family. Compared with switching regulators, LDOs add no switching noise to the rail but dissipate VIN-VOUT as heat, making them preferred for noise-sensitive analog and RF supply rails.
The SP6205EM5-L/TR supports an input voltage range suitable for single-cell Li-ion and 3.3 V/5 V rail operation and delivers up to 500 mA of continuous load current. Logic-controlled shutdown is provided through a dedicated enable pin, and the device exhibits low quiescent current across load. Internal protection includes current limit and thermal shutdown to safeguard against overload and junction over-temperature conditions.
Internally, the SP6205 family uses a PMOS pass transistor architecture with a precision bandgap reference and an external noise-reduction (bypass) node. Adding a 10 nF capacitor from BYP to GND collapses the reference noise into the sub-µVRMS regime, making this regulator well suited to RF, audio, and precision ADC/DAC supply rails. The SOT-23-5 footprint also simplifies PCB swap when migrating the SP6201 from a related part or moving to the 100 mA SP6213 in SC-70.
Typical applications include mobile and portable battery-powered devices, post-regulation following a switching converter, noise-sensitive analog modules, USB peripherals, and handheld instrumentation. Designers usually pair it with a 1 µF ceramic input/output capacitor network and a 10 nF bypass capacitor to achieve the headline 12 µVRMS noise figure.
When designing with the SP6205EM5-L/TR, prioritize a low-ESR ceramic output capacitor (X7R/X5R) of at least 1 µF to maintain loop stability, and place the bypass capacitor directly adjacent to the BYP pin to maximize noise rejection. The adjustable output version requires two precision resistors referenced to the internal VREF.
This page consolidates distributor pricing, drop-in compatible alternatives, and practical design notes that synthesize information from the manufacturer datasheet and distributor listings, providing engineering value beyond the bare datasheet alone.
Drop-in alternatives for SP6205EM5-L/TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SP6205EM5-L-1-8/TR
✅ Drop-In📋 Reference alternative (not in catalog)
SP6205EM5-L-3-0/TR
✅ Drop-In📋 Reference alternative (not in catalog)
SP6205EM5-L-3-3/TR
✅ Drop-In📋 Reference alternative (not in catalog)
SP6205EM5-L
✅ Drop-In📋 Reference alternative (not in catalog)
MIC5205
✅ Drop-In📋 Reference alternative (not in catalog)
SP6205EM5-L/TR Maximum Ratings & Electrical Characteristics
| Regulator Type | Low Dropout (LDO) |
| Output Polarity | Positive |
| Output Type | Adjustable |
| Number of Outputs | 1 |
| Maximum Output Current | 500 mA |
| Dropout Voltage (Typical) | 0.6 V (PMOS pass device) |
| Output Voltage Accuracy | 2 % over temperature |
| Output Noise | 12 µVRMS (with 10 nF bypass) |
| Pass Device | PMOS |
| Enable Pin | Yes (logic-controlled shutdown) |
| Package | SOT-23-5 (5-pin) |
| Mounting Type | Surface Mount |
| Packaging | Tape & Reel (/TR) |
| Lead-Free / RoHS | Lead Free / RoHS Compliant (per distributor listings) |
| Internal Protection | Current limit, thermal shutdown |
SP6205EM5-L/TR Pin Configuration
| Pin 1 | IN — Input voltage supply |
| Pin 2 | GND — Ground |
| Pin 3 | EN — Enable (logic high = on, logic low = shutdown) |
| Pin 4 | BYP — Bypass capacitor for low-noise operation (10 nF to GND) |
| Pin 5 | OUT/ADJ — Regulated output (adjustable via external resistor divider for the "L" version) |
Typical Applications
SP6205EM5-L/TR is suitable for 6 applications: Battery-Powered Portable Devices, Post-Switching-Regulator Noise Filter, RF and Wireless Module Power, Precision Analog and ADC/DAC Supplies, USB and Peripheral Power Rails, Handheld Test and Measurement Instrumentation.
Battery-Powered Portable Devices
The SP6205EM5-L/TR suits battery-powered portable devices where an ultra-low-noise rail must extend battery life without compromising analog signal quality. The PMOS pass device yields a low 0.6 V dropout typical, maximizing usable run-time from a single-cell Li-ion or two-cell alkaline stack as it discharges toward its cutoff voltage. The 12 µVRMS output noise with a 10 nF bypass capacitor keeps clock and audio circuitry clean, while the SOT-23-5 footprint conserves board area for small-form-factor designs such as wearables, handheld meters, and wireless sensor nodes.
Recommended
Post-Switching-Regulator Noise Filter
Placed downstream of a switching DC-DC converter, the SP6205EM5-L/TR removes ripple and switching noise from low-current analog and RF rails. The 500 mA load capability supports op-amps, RF transceivers, and sensor front-ends, while the 12 µVRMS headline noise floor prevents switching artifacts from leaking into measurement or signal-conditioning chains. Designers commonly use it to clean up a 3.3 V or 1.8 V rail generated by a buck regulator, taking advantage of the LDO's high PSRR at the switching fundamental and its harmonics without re-introducing switching frequency noise.
Recommended
RF and Wireless Module Power
The SP6205EM5-L/TR delivers the clean, low-noise supply required by RF transceivers, Bluetooth/Wi-Fi modules, and GNSS receivers. Low-noise rails are critical to preserve receiver sensitivity and transmit EVM, and the LDO's high PSRR plus 12 µVRMS noise figure ensure the supply does not couple phase noise or spurs into the LO, mixer, or PA stages. The 500 mA rating handles short transmit bursts with margin, and the small SOT-23-5 package fits directly under shields or beside the antenna-matching network.
Recommended
Precision Analog and ADC/DAC Supplies
The SP6205EM5-L/TR powers precision op-amps, instrumentation amplifiers, and ADC/DAC reference inputs where supply noise directly translates into measurement error or reduced effective resolution. The external bypass-capacitor-reduced 12 µVRMS noise ensures reference voltages remain stable across code transitions, while the 2% output accuracy supports 12-bit and limited 14-bit converter performance. The LDO's fast line/load transient response keeps the rail well-behaved during SAR ADC sampling-current spikes, avoiding kickback-induced conversion errors.
Recommended
USB and Peripheral Power Rails
The SP6205EM5-L/TR delivers regulated power to USB peripherals, hubs, and downstream port controllers from a 5 V bus or higher internal rail. Its 500 mA rating pairs well with USB 2.0 downstream port power budgets, while the logic-controlled enable pin supports suspend-mode current management required by the USB specification. Low quiescent current during shutdown ensures compliance with USB suspend power limits, and the small SOT-23-5 footprint fits inside densely populated Type-A/C receptacle and connector modules.
Recommended
Handheld Test and Measurement Instrumentation
Handheld multimeters, oscilloscope probes, field meters, and IoT diagnostic tools rely on the SP6205EM5-L/TR for clean, regulated rail voltages to analog front-ends, microcontrollers, and displays. The ultra-low 12 µVRMS noise with bypass ensures that measurement-accuracy is not compromised by supply-induced errors, and the high PSRR cleans up ripple from upstream boost converters used to support higher-voltage measurement inputs. The compact SOT-23-5 footprint enables integration inside pen-style probes and clip-on current transducers where every square millimeter of board counts.
Recommended
Recommended Products Summary
Engineering reference data for SP6205EM5-L/TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SP6205EM5-L-1-8/TR | SP6205EM5-L-3-0/TR | SP6205EM5-L-3-3/TR | MIC5205 |
|---|---|---|---|---|---|
| Package | SOT-23-5 | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same | SOT-23-5 - same |
| Brand | MaxLinear | MaxLinear | MaxLinear | MaxLinear | Microchip Technology |
| Maximum Output Current | 500 mA | 500 mA | 500 mA | 500 mA | 150 mA |
| Output Type | Adjustable | Fixed 1.8 V | Fixed 3.0 V | Fixed 3.3 V | Adjustable / Fixed |
| Enable Pin | Yes | Yes | Yes | Yes | Yes |
| Packaging | Tape & Reel (/TR) | Tape & Reel (/TR) | Tape & Reel (/TR) | Tape & Reel (/TR) | Tube / Tape & Reel |
Key Differentiators
- Adjustable-output variant of the SP6205 family (vs SP6205EM5-L-3-3/TR)
- Higher current rating than the SP6201 (vs SP6201EM5)
- 12 µVRMS noise with inexpensive 10 nF bypass vs. unfiltered CMOS LDOs (vs Generic 500 mA CMOS LDO (e.g. MIC5205))
Design Notes
Place the 10 nF BYP bypass capacitor as close as possible to the BYP pin with the shortest possible trace to GND. This distance is the single biggest factor in realizing the headline 12 µVRMS noise figure, and any extra series inductance between the BYP pin and the bypass capacitor will let internal reference noise leak through to the output. Use a 1 µF (or larger) low-ESR ceramic input capacitor and a 1 µF output capacitor directly adjacent to the IN and OUT pins for stable regulation.
Even though the SOT-23-5 package has a limited thermal pad, at low VIN-to-VOUT differential the LDO dissipates little heat. Estimated: at VIN = 3.6 V, VOUT = 3.3 V, and IOUT = 500 mA, the dissipation is approximately 0.15 W, well within the package rating. Avoid sustained operation at near the absolute-maximum VIN with high load current, as the absence of an exposed thermal pad limits the SOT-23-5's thermal envelope; for high-dropout high-current applications, migrate to the SP6205ER-L/TR in the 8-pin DFN with thermal pad.
Do not substitute the SP6201 family for the SP6205 if the load requires more than 200 mA of continuous current - the lower current limit will trigger the SP6201 into dropout or current limit and the rail will collapse. Likewise, the SP6205ER-L/TR (8-pin DFN) is pin-compatible at the silicon level but requires a different PCB land pattern; do not assume it is a drop-in for the SOT-23-5 "/L" version. Finally, always tie the EN pin to a defined logic level - leaving it floating can produce unpredictable startup behavior.
Compliance Information
Lead-free and RoHS compliant per multiple distributor listings (DigiKey, Mouser, LCSC). AEC-Q100 grade is not specified; for automotive designs confirm with the manufacturer. Halogen-free and conflict-minerals certifications not stated in the verified data.
