MIC29152WT - 1.5A LDO Regulator, Adjustable, TO-220-5 | Microchip
N.º da peça: MIC29152WT ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $4.36 | $4,36 |
| 10 | $3.92 | $39,20 |
| 100 | $3.49 | $349,00 |
| 500 | $3.06 | $1.530,00 |
| 1.000 | $2.71 | $2.710,00 |
MIC29152WT Visão geral
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 voltage regulators and power management ICs (PMICs), and are favored for their low noise, simplicity, and fast transient response when compared to switching regulators. The MIC29152WT builds on Micrel's proprietary Super Beta PNP process, which allows high-current delivery with a single PNP transistor and eliminates the need for external PNP pass devices.
Key features include a 1.5A continuous output current, 350-425 mV typical dropout at full load, an active-high shutdown pin for power sequencing, an adjustable output set by an external resistor divider, internal current limiting, thermal shutdown, and reverse-battery protection. The TO-220-5 package provides a low thermal resistance path through the tab for efficient heat dissipation.
The PNP pass architecture with Super Beta process technology yields excellent load transient response and low quiescent current, making this part suitable for post-regulator filtering of switching supplies and for battery-powered applications. The wide VIN range allows operation directly from multi-cell battery stacks, 5V or 12V rails, or post-regulated intermediate voltages.
Typical applications include post-regulation for switching power supplies, battery-powered equipment, USB and peripheral power rails, industrial 12V/24V systems, and high-current point-of-load regulation for FPGAs, microcontrollers, and DSPs. The shutdown pin enables power sequencing in multi-rail systems.
When designing with this device, verify that VIN - VOUT remains above the dropout threshold under worst-case load to maintain regulation. Add adequate copper area or a heatsink to the TO-220 tab for high dissipation scenarios above 2W.
This page synthesizes distributor pricing, drop-in compatible alternatives from same-package Microchip parts, and practical design notes that are not collated in the manufacturer datasheet alone.
Alternativas drop-in para MIC29152WT — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Variantes desta série
Modelos da mesma série compatíveis como drop-in com MIC29152WT (mesmo formato e footprint) — diferindo em Input Voltage Range, Mounting Type, Output Type, Package.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
MIC29150WT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC29152WU
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC29152WD
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC29152WUT
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC29152WU-TR
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
MIC29152WT Classificações máximas e características elétricas
| Manufacturer | Microchip Technology (formerly Micrel Semiconductor) |
| Part Number | MIC29152WT |
| Product Type | Linear Voltage Regulator IC (LDO) |
| Número de saídas | 1 |
| Output Polarity | Positive |
| Tipo de saída | Adjustable |
| Faixa de tensão de saída | 1.25 V to 26 V |
| Faixa de tensão de entrada | 2.5 V to 26 V |
| Corrente máxima de saída | 1.5 A |
| Typical Dropout Voltage at Full Load | 350 mV to 425 mV |
| Pass Element | PNP (Super Beta PNP process) |
| Shutdown Pin | Yes (active-high) |
| Encapsulamento | TO-220-5 (through-hole with tab) |
| Tipo de montagem | Through-Hole |
| Status RoHS | RoHS Compliant (per DigiChip datasheet listing) |
| Lead Free | Yes |
| Description | High-Current Low-Dropout Voltage Regulator |
Configuração de pinos do MIC29152WT
| Pino 1 | EN/SHDN — Active-high enable/shutdown input (logic high = regulator on) |
| Pino 2 | VIN — Input supply voltage (2.5V to 26V) |
| Pino 3 | GND — Ground reference (also electrically tied to tab) |
| Pino 4 | VOUT — Regulated output voltage (1.25V to 26V adjustable) |
| Pino 5 | ADJ — Feedback input for output voltage programming via external resistor divider |
Aplicações típicas
MIC29152WT é adequado para 6 aplicaçãos: Post-Regulator for Switching Power Supplies, Battery-Powered Equipment, Industrial 12V/24V Systems, FPGA / Microcontroller Point-of-Load Regulation, USB and Peripheral Power Rails, High-Current Noise Filter for Analog / RF.
Post-Regulator for Switching Power Supplies
The MIC29152WT's PNP pass element with 350-425 mV dropout makes it ideal as a post-regulator to clean up switching ripple on intermediate rails. With 1.5A output capability and low output noise (no switching artifacts of its own), it can sit downstream of a buck converter to provide a clean 3.3V or 5V rail for analog, RF, or precision mixed-signal loads. Engineers typically pair it with a 10-22uF ceramic input capacitor and a small output capacitor for optimum PSRR. Compared to running the LDO directly off a noisy bus, this topology achieves both high efficiency at the front end and clean power at the load.
Recomendado
Battery-Powered Equipment
The MIC29152WT's wide 2.5V-26V input range and low 350 mV dropout at full load make it well-suited for battery-powered systems where the input voltage sags toward the regulated output. The PNP Super Beta architecture yields high efficiency even when the battery is partially discharged, extending run time. Its 1.5A current capability supports moderate loads such as single-board computers, sensor arrays, and communication modules. The shutdown pin enables low-power standby modes, drawing only microamps when disabled, which is critical for battery life in portable and IoT applications.
Recomendado
Industrial 12V/24V Systems
Industrial 24V bus systems commonly need a regulated 5V, 12V, or 15V rail for sensors, relays, and microcontrollers. The MIC29152WT accepts up to 26V input and delivers 1.5A at 1.25V-26V output, covering the full range of standard industrial voltages from a single device. Its PNP pass element handles fast input transients (such as those from inductive loads and motor back-EMF) that are common on industrial 24V rails. Reverse-battery protection and thermal shutdown add robustness for harsh factory environments where wiring errors and ambient temperature swings are routine.
Recomendado
FPGA / Microcontroller Point-of-Load Regulation
FPGAs, microcontrollers, and DSPs typically require multiple lower-voltage rails at currents up to several amps. The MIC29152WT can serve as a dedicated point-of-load regulator for sub-rails such as 2.5V core or 3.3V I/O, especially in distributed power architectures where each load gets its own local LDO. The shutdown pin allows sequenced power-up per the manufacturer's requirements, and the 1.5A capacity covers most MCU/FPGA aux-rail demands. Placing the LDO adjacent to the load minimizes PCB distribution losses and provides fast transient response.
Recomendado
USB and Peripheral Power Rails
USB downstream ports and peripheral supplies commonly require a regulated 5V rail at up to 1.5A per port. The MIC29152WT can supply this directly from a 7-15V upstream rail with 350-425 mV dropout, leaving adequate headroom for transient protection. The shutdown pin supports per-port enable/disable in multi-port designs and active current limiting protects against short circuits. Compared to a switching regulator, the MIC29152WT produces no EMI that could interfere with USB data lines, and its simplicity reduces BOM count and PCB area.
Recomendado
High-Current Noise Filter for Analog / RF
When a noisy switching supply feeds sensitive analog or RF circuitry, the MIC29152WT can act as a high-current noise filter. Because it has no switching artifacts of its own, it produces an output whose noise floor is dominated only by thermal noise. With 1.5A capability, it can supply entire analog front-end subsystems, op-amp chains, or RF mixers directly. The 350-425 mV dropout lets it operate from a 5V or 12V intermediate rail with minimal voltage loss, and the PNP pass element provides excellent PSRR at audio and low-RF frequencies.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para MIC29152WT — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | MIC29150WT | MIC29152WU | MIC29152WD | MIC29152WUT | MIC29152WU-TR |
|---|---|---|---|---|---|---|
| Package | TO-220-5 | TO-220-5 (same) | TO-220-5 (same) | TO-220-5 (same) | TO-220-5 (same) | TO-220-5 (same) |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Output Current | 1.5 A | 1.5 A | 1.5 A | 1.5 A | 1.5 A | 1.5 A |
| Output Voltage Range | 1.25 V to 26 V (adjustable) | 1.25 V to 26 V | 1.25 V to 26 V | 1.25 V to 26 V | 1.25 V to 26 V | 1.25 V to 26 V |
| Input Voltage Range | 2.5 V to 26 V | 2.5 V to 26 V | 2.5 V to 26 V | 2.5 V to 26 V | 2.5 V to 26 V | 2.5 V to 26 V |
| Dropout Voltage (typ at full load) | 350-425 mV | 350-425 mV | 350-425 mV | 350-425 mV | 350-425 mV | 350-425 mV |
| Shutdown Pin | Yes (active-high) | No | Yes | Yes | Yes | Yes |
| Pass Element | PNP (Super Beta PNP) | PNP (Super Beta PNP) | PNP (Super Beta PNP) | PNP (Super Beta PNP) | PNP (Super Beta PNP) | PNP (Super Beta PNP) |
| RoHS / Lead Free | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes | Yes / Yes |
Principais diferenciais
- Active-high shutdown pin for sequenced power-up (vs MIC29150WT)
- Wide 2.5V-26V input range with low dropout (vs MIC29150WT)
- TO-220-5 package with high thermal headroom (vs SOT-223 or DPAK LDOs in 1.5A class)
Notas de projeto
Estimated: at VIN=12V, VOUT=5V, IOUT=1.5A, the MIC29152WT dissipates approximately (12-5)*1.5 = 10.5 W. The TO-220-5 package has a junction-to-ambient thermal resistance of about 50 C/W with 1 sq inch of copper pour on the tab, so junction temperature rise is approximately 10.5 W * 50 C/W = 525 C above ambient - well above the 150 C absolute maximum. A clip-on heatsink (theta_JA ~30 C/W) or larger copper pour (theta_JA ~35 C/W) is required to keep junction temperature within safe limits. Always verify with the manufacturer's thermal curves for production designs.
Place the input capacitor as close as possible to the VIN pin and the GND tab to minimize the high-frequency current loop and reduce input voltage ringing. Use a 10 uF or larger low-ESR ceramic or tantalum capacitor on the input. The output capacitor value depends on the specific variant - many MIC2915x parts require a minimum of 10-22 uF on the output for stability. The TO-220 tab must be soldered to a copper pour that serves both as a heatsink and as the low-impedance ground return.
Do not exceed the absolute maximum input voltage of 26V (the part is rated to 26V continuous, with transients rated to higher levels per the datasheet). Use 1% tolerance or better resistors in the feedback divider to maintain output voltage accuracy. If the EN/SHDN pin is left floating, the part will power up - tie it to VIN if shutdown is not needed. Reverse-polarity protection is internal, but adding an external reverse-blocking diode on VIN protects against sustained reverse voltage beyond absolute maximum ratings.
Informações de conformidade
RoHS and lead-free confirmed via DigiChip datasheet listing. REACH, halogen-free, and conflict-mineral declarations not present in verified data; confirm with Microchip for production builds. AEC-Q100 automotive qualification not applicable (not in verified data).
