MIC47100YML-TR - 1A Low-VIN LDO Regulator | Microchip | 8-MLF
MPN: MIC47100YML-TR ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.85 | $1.85 |
| 10 | $1.62 | $16.20 |
| 100 | $1.28 | $128.00 |
| 500 | $1.05 | $525.00 |
| 1,000 | $0.89 | $890.00 |
| 5,000 | $0.74 | $3,700.00 |
MIC47100YML-TR Overview
An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input voltage is very close to the output voltage. LDOs sit within the broader hierarchy of linear regulators, themselves a sub-family of voltage regulators and ultimately part of the power management IC (PMIC) category. Because they burn the excess VIN−VOUT as heat, LDOs add no switching noise to the rail - making them the default choice for point-of-load supplies that follow a switching pre-regulator.
Key features of the MIC47100 include an adjustable output range from 0.8V to 2V (the YML variant) plus fixed-voltage members, an ultra-low 80 mV typical dropout at full 1A load, and stability with only a 1 µF ceramic output capacitor - eliminating the bulky tantalum or electrolytic capacitors required by older LDOs. The part also integrates a single active-high enable pin for sequenced power-up and a "zero off-mode-current" shutdown state, allowing downstream battery savings in portable systems.
Architecturally, the MIC47100 uses a high-bandwidth pass element and a precision bandgap reference to deliver fast transient response to load steps, which is critical for powering modern FPGAs, ASICs, and high-speed digital logic. The wide VIN range (down to 1V) lets the part regulate point-of-load rails directly from a 1.2V or 1.5V intermediate bus, removing an extra regulator stage.
Typical applications include FPGA/ASIC core and I/O voltage rails in networking switches, DDR memory termination supplies, portable/handheld point-of-load regulation, industrial single-board computers, and any board that needs a clean, low-noise 1A rail generated from an existing low-voltage bus.
When designing with the MIC47100YML-TR, keep input-to-output headroom below 3.6V and place the 1 µF ceramic input/output capacitors as close to the IC as possible. The exposed pad must be soldered to a sufficient ground copper pour to keep junction temperature within the -40 °C to +125 °C operating range.
This page synthesizes distributor pricing, same-brand and cross-brand alternatives, and practical design notes not found in the manufacturer datasheet, giving engineers an actionable reference for selecting the MIC47100YML-TR.
Drop-in alternatives for MIC47100YML-TR — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with MIC47100YML-TR (same form factor and footprint) — differing in Input Voltage Range, Maximum Output Current, Output Voltage Range, Package, Topology.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
MIC47100-1.0YML-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC47100-1.2YML-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC47100-1.5YML-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC47100YMME-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC47100-1.8YMME-TR
✅ Drop-In📋 Reference alternative (not in catalog)
MIC23303YML-T5
✅ Drop-In✓ In Stock
$1.84 / Unit
View Datasheet →MIC47100YML-TR Maximum Ratings & Electrical Characteristics
| Manufacturer | Microchip Technology |
| Product Type | LDO Linear Voltage Regulator |
| Topology | Positive, single-output, low-dropout |
| Output Configuration | Adjustable |
| Output Voltage Range | 0.8 V to 2 V |
| Input Voltage Range | 1 V to 3.6 V |
| Maximum Output Current | 1 A |
| Dropout Voltage (typical) | 80 mV at 1 A |
| Output Accuracy | ±2% |
| Line Regulation | 0 % |
| Load Regulation | 0 % |
| Output Capacitor | 1 µF ceramic (stable) |
| Enable Pin | Active-high |
| Shutdown Current | "Zero" off-mode-current |
| Package | 8-MLF® (2 mm × 2 mm DFN-EP) |
| Mounting Type | Surface Mount |
| Operating Temperature | -40 °C to +125 °C |
| RoHS Status | Compliant |
| Lead Free | Yes |
MIC47100YML-TR Pin Configuration
| Pin 1 | EN — Enable (active-high); drive low for shutdown |
| Pin 2 | VIN — Input supply voltage (1 V to 3.6 V) |
| Pin 3 | GND — Ground |
| Pin 4 | ADJ — Adjustable feedback node; connect to resistor divider |
| Pin 5 | VOUT — Regulated output voltage |
| Pin 6 | NC — Not connected (per datasheet) |
| Pin 7 | NC — Not connected (per datasheet) |
| Pin 8 | EP — Exposed thermal pad - must be soldered to GND plane |
Typical Applications
MIC47100YML-TR is suitable for 6 applications: FPGA/ASIC Core Voltage Rails, DDR Memory Termination Supply (VTT), Portable / Handheld Point-of-Load Regulation, Networking Switch Line-Card Logic Rails, Industrial Single-Board Computer (SBC) Supplies, Test & Measurement Point-of-Load Reference Rails.
FPGA/ASIC Core Voltage Rails
The MIC47100YML-TR is purpose-built for low-voltage, high-current point-of-load regulation directly from a 1.5 V or 3.3 V intermediate bus, making it an ideal supply for FPGA and ASIC core rails (0.85 V, 0.9 V, 1.0 V, 1.2 V, 1.5 V, 1.8 V). Its 80 mV dropout at 1 A and 1 µF ceramic-only output stability eliminate the need for bulk tantalum capacitors, allowing dense PCB layouts next to modern low-power FPGAs. Unlike switching regulators, the MIC47100 adds no high-frequency ripple to the rail, which is critical when the downstream load includes sensitive PLLs, transceivers, or high-speed SERDES blocks.
Recommended
DDR Memory Termination Supply (VTT)
The MIC47100YML-TR's adjustable 0.8-2 V output and 1 A capability match the requirements of DDR/DDR2/DDR3 termination (VTT) rails that must source and sink current while tracking VDDQ/2. With 80 mV dropout at 1 A and 1 µF ceramic-only stability, the regulator delivers a low-impedance point-of-load supply with no switching noise that could couple into the high-speed memory bus. Designers typically feed the MIC47100 from a 1.5 V or 1.8 V intermediate bus generated by a switching pre-regulator, then use the LDO to clean up the final VTT rail for memory integrity.
Recommended
Portable / Handheld Point-of-Load Regulation
The MIC47100YML-TR's "zero off-mode-current" shutdown state via its active-high enable pin makes it a strong fit for battery-powered handheld devices that must drop quiescent draw to zero in sleep mode. With 1.0-3.6 V VIN tolerance, it can regulate directly from a single-cell Li-ion (3.0-4.2 V) after a step-down pre-regulator, or from a 1.5 V alkaline stack without an intermediate stage. The 2 mm × 2 mm 8-MLF® footprint minimizes PCB area in space-constrained wearables, handhelds, and IoT endpoints where every square millimeter of board space matters.
Recommended
Networking Switch Line-Card Logic Rails
The MIC47100YML-TR's 1 A output and 80 mV dropout suit it for generating 0.9 V or 1.0 V logic rails for switch ASICs, retimers, and PHY interfaces on networking line cards. The 1.0-3.6 V VIN range accepts the standard 1.5 V or 3.3 V intermediate bus that already exists on most telecom/datacom boards, eliminating an extra regulator stage and reducing BOM count. Because the LDO adds no switching noise, it preserves signal integrity on multi-gigabit SERDES lanes where even a few mV of ripple would degrade eye-diagram margins.
Recommended
Industrial Single-Board Computer (SBC) Supplies
The MIC47100YML-TR's -40 °C to +125 °C operating range and 8-MLF® 2 × 2 mm footprint make it suitable for industrial SBCs that need clean, low-voltage rails in compact form factors. With stability from a single 1 µF ceramic, it removes the bulk output capacitors that would otherwise dominate board real estate. Designers commonly use the MIC47100 as a post-regulator following a wide-VIN buck converter to deliver a clean 1.0 V or 1.2 V rail to a microcontroller, FPGA, or SoC without injecting switching ripple into analog or mixed-signal sections.
Recommended
Test & Measurement Point-of-Load Reference Rails
The MIC47100YML-TR's low-noise LDO topology (no switching ripple) and 0.8-2 V adjustable output suit it as a clean point-of-load reference for ADC reference buffers, DAC reference pins, and analog front-end (AFE) sections in bench-top instruments. With 1 A capability, a single MIC47100 can power an entire small AFE board including op-amps, reference buffers, and bias networks. The 1 µF ceramic-only stability avoids the leakage and dielectric absorption that would otherwise degrade instrument accuracy through tantalum or electrolytic capacitors.
Recommended
Recommended Products Summary
Engineering reference data for MIC47100YML-TR — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | MIC47100-1.0YML-TR | MIC47100-1.2YML-TR | MIC47100-1.5YML-TR | MIC47100YMME-TR | MIC47100-1.8YMME-TR | MIC23303YML-T5 |
|---|---|---|---|---|---|---|---|
| Package | 8-MLF® (2x2 mm DFN-EP) | 8-MLF® (2x2 mm DFN-EP) - same | 8-MLF® (2x2 mm DFN-EP) - same | 8-MLF® (2x2 mm DFN-EP) - same | 8-MSOP-EP (3x3 mm) | 8-MSOP-EP (3x3 mm) | 10-MLF® (2x2 mm) |
| Brand | Microchip Technology | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same | Microchip Technology - same |
| Output Type | Adjustable (0.8 V to 2 V) | Fixed 1.0 V | Fixed 1.2 V | Fixed 1.5 V | Adjustable (0.8 V to 2 V) | Fixed 1.8 V | Adjustable |
| Maximum Output Current | 1 A | 1 A - same | 1 A - same | 1 A - same | 1 A - same | 1 A - same | 3 A (+200%) |
| Input Voltage Range | 1 V to 3.6 V | 1 V to 3.6 V - same | 1 V to 3.6 V - same | 1 V to 3.6 V - same | 1 V to 3.6 V - same | 1 V to 3.6 V - same | 2.25 V to 5.5 V (higher) |
| Enable Pin | Yes (active-high, zero Iq off) | Yes - same | Yes - same | Yes - same | Yes - same | Yes - same | Yes |
| Operating Temperature | -40 °C to +125 °C | -40 °C to +125 °C - same | -40 °C to +125 °C - same | -40 °C to +125 °C - same | -40 °C to +125 °C - same | -40 °C to +125 °C - same | -40 °C to +125 °C - same |
Key Differentiators
- Lowest-VIN LDO at 1.0 V input ceiling for direct 1.5 V/3.3 V bus regulation (vs MIC23303YML-T5)
- Smallest-footprint 1 A LDO in the MIC47100 family (vs MIC47100YMME-TR)
- Adjustable output across 0.8-2 V in a single footprint (vs MIC47100-1.0YML-TR / -1.2YML-TR / -1.5YML-TR fixed variants)
Design Notes
Estimated: at VIN = 3.3 V, VOUT = 1.0 V, and 1 A load, the MIC47100YML-TR dissipates roughly (3.3-1.0) × 1 = 2.3 W. With a 2 mm × 2 mm 8-MLF® package and θJA around 90 °C/W on a 1 oz copper 1-square-inch pad, junction temperature would rise ~207 °C above ambient - far above the 125 °C limit. For sustained 1 A operation, solder the exposed pad (pin 8) to a generous GND copper pour (≥ 0.5 in²) and consider adding thermal vias to inner planes to keep Tj ≤ 125 °C.
Place the 1 µF ceramic input and output capacitors within 2 mm of their respective pins to minimize parasitic inductance. Use X5R or X7R dielectric 0402/0603 ceramics (≥ 4.7 µF recommended for VIN transients). Route the ADJ feedback trace away from noisy switching nodes - for the adjustable YML variant use a Kelvin connection directly at the output capacitor pad to preserve ±2% accuracy.
Do not exceed 3.6 V on VIN - the MIC47100 is a low-VIN LDO and will be damaged above its absolute-maximum rating. The enable pin is active-high; leaving it floating defaults the part ON in some board configurations, so tie EN through a 100 kΩ resistor to a known logic level if sequencing matters. For the adjustable variant, choose ADJ resistors of ≤ 100 kΩ to minimize the impact of ADJ pin bias current on output accuracy.
Compliance Information
RoHS compliant and lead-free per distributor listings (DigiKey, Mouser) as of 2026-10-09. AEC-Q100 automotive qualification not specified - not recommended for safety-critical automotive applications without further qualification.
