UPC2925BHB-AZ - 1A 2.5V Fixed LDO Regulator | Renesas
Référence : UPC2925BHB-AZ ✓ Actif| Qté | Prix unitaire | Total |
|---|---|---|
| 1 | $1.92 | $1,92 |
| 10 | $1.68 | $16,80 |
| 100 | $1.42 | $142,00 |
| 500 | $1.18 | $590,00 |
| 1 000 | $0.96 | $960,00 |
UPC2925BHB-AZ Présentation
An LDO (low-dropout) linear regulator is a type of voltage regulator that maintains a stable output voltage even when the input-to-output differential is very small. LDOs sit one level below generic linear regulators in the power-management hierarchy: voltage regulator -> linear regulator -> LDO -> power management IC. Because they require no switching action, LDOs add no high-frequency EMI to the output rail, which is why they dominate noise-sensitive analog and RF power designs where any ripple from a buck converter would be unacceptable.
Key features include a fixed 2.5 V output (no external feedback resistors needed), 1 A continuous output current in a compact SC-64 package, internal current-limit and thermal-shutdown protection, and lead-free / RoHS-compliant construction. The combination of fixed output and small through-hole footprint simplifies PCB layout versus adjustable LDOs that require an external resistor divider.
The UPC2925BHB-AZ uses an internal NPN pass architecture with on-chip trimming to hold output accuracy across operating conditions. Internally generated reference voltage drives the error amplifier, which modulates pass transistor base current to regulate VOUT. The dropout voltage is kept low enough to permit use at moderate headroom in 3.3 V and 5 V systems. Bipolar construction gives robust short-circuit and thermal behavior compared with many CMOS LDOs.
Typical applications include 2.5 V power rails for DDR memory termination, microcontroller core supplies, industrial controllers, and as a post-regulator following a switching converter to remove switching ripple from sensitive analog rails. The fixed 2.5 V output is particularly valuable for logic-level translation and DDR termination voltage generation.
When designing with this part, ensure the input capacitor and output capacitor ratings satisfy the datasheet ESR window to maintain stability; insufficient ESR can cause oscillation. Verify that worst-case power dissipation (P_D = (V_IN - V_OUT) * I_OUT) stays within the SC-64 thermal envelope, and consider a clip-on heatsink if dissipation exceeds roughly 1 W in a still-air environment.
This page synthesizes distributor pricing, drop-in alternative listings, and practical design guidance that go beyond the bare Renesas datasheet to help procurement and engineering teams make a replacement decision with confidence.
Alternatives de remplacement direct pour UPC2925BHB-AZ — même boîtier, compatible broche à broche. Les références à boîtier différent nécessitant une retouche du PCB sont exclues.
Outil de comparaison rapide — sélectionnez des références alternatives pour une comparaison côte à côte :
UPC2933BHB-AZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UPC2950BHB-AZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UPC2918BHB-AZ
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UPC2925BHB
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
MC33269D-2.5G
✅ Remplacement direct📋 Alternative de référence (hors catalogue)
UPC2925BHB-AZ Valeurs maximales et caractéristiques électriques
| Regulator Type | Low Dropout (LDO) |
| Type de sortie | Fixed |
| Tension de sortie | 2.42 V to 2.58 V (typ. 2.5 V) |
| Output Polarity | Positive |
| Courant de sortie maximal | 1 A |
| Nombre de sorties | 1 |
| Nombre de broches | 3 |
| Boîtier | SC-64 (MP-3) |
| Type de montage | Through-Hole / Surface Mount (per supplier description) |
| Life Cycle Stage | Active |
| Lead-Free | Yes |
| Statut RoHS | Compliant |
Configuration des broches de UPC2925BHB-AZ
| Broche 1 | VIN — Input voltage to the regulator |
| Broche 2 | GND — Ground (often tied to the metal tab) |
| Broche 3 | VOUT — Regulated 2.5 V output |
Applications typiques
UPC2925BHB-AZ convient pour 6 applications: DDR Memory Termination Voltage Rail, Microcontroller Core Supply, Industrial Controller Power Conditioning, Analog Reference / ADC Power Rail, Consumer Electronics Local Regulation, Test and Measurement Equipment Internal Rails.
DDR Memory Termination Voltage Rail
The UPC2925BHB-AZ outputs a fixed 2.5 V at up to 1 A, which is the canonical Vtt termination reference for DDR1 SDRAM memory systems. Its 2.42 V-to-2.58 V output window matches the DDR termination tolerance, and its bipolar linear regulator topology adds no switching ripple onto the termination rail - critical because Vtt must track VREF closely to avoid bus contention. Placed downstream of a 3.3 V switching converter, the UPC2925BHB-AZ cleans switching ripple while delivering ample headroom for memory write cycles.
Recommandé
Microcontroller Core Supply
Many 8-bit and 16-bit microcontrollers historically run from a 2.5 V core rail derived from a higher-voltage battery or bus. The UPC2925BHB-AZ delivers up to 1 A of clean, ripple-free 2.5 V from inputs up to its published maximum, ideal for digital control loops in industrial and consumer electronics. The fixed voltage eliminates resistor-divider BOM cost, and the SC-64 package is easy to solder by hand for low-volume microcontroller boards.
Recommandé
Industrial Controller Power Conditioning
In factory automation PLCs and industrial controllers, the UPC2925BHB-AZ serves as a local post-regulator that removes ripple from upstream switching converters feeding noise-sensitive analog input stages. Its 1 A current capability supports multiple ADC channels and reference buffers simultaneously, while the bipolar architecture provides strong line-transient rejection typical of industrial 24 V bus environments. The SC-64 package withstands the higher operating temperatures of enclosed industrial cabinets.
Recommandé
Analog Reference / ADC Power Rail
Precision SAR and sigma-delta ADCs require very low-noise analog supply rails for accurate conversions. The UPC2925BHB-AZ as a 2.5 V linear post-regulator following a switching converter gives ADCs a quiet rail without the EMI pickup that switching noise induces on analog subsections. With its low noise contribution and fixed 2.5 V, the part is well-matched to many precision ADCs that specify 2.5 V as their AVDD level, simplifying PCB layout.
Recommandé
Consumer Electronics Local Regulation
Set-top boxes, gateways, and consumer appliances frequently need a 2.5 V rail for ASIC cores, codec chips, or memory terminations. The UPC2925BHB-AZ gives designers a 1 A fixed 2.5 V supply in a compact SC-64 package without external resistors, lowering BOM cost and PCB area. Its lead-free construction is required by modern consumer RoHS-compliant designs.
Recommandé
Test and Measurement Equipment Internal Rails
Bench instruments and ATE fixtures often require stacked voltage rails for FPGA configuration memory, level translators, and reference ICs. The UPC2925BHB-AZ provides a clean 2.5 V reference for test points and level-translation channels, where any switching converter ripple would couple into sensitive measurement paths. The bipolar topology gives the predictable, low-noise behavior that measurement-grade equipment demands.
Recommandé
Récapitulatif des produits recommandés
Données de référence d'ingénierie pour UPC2925BHB-AZ — comparaison, recommandations de conception et informations de conformité.
Guide de sélection
Comparaison avec les alternatives
| Paramètre | Ce produit | UPC2933BHB-AZ | UPC2950BHB-AZ | UPC2918BHB-AZ | UPC2925BHB | MC33269D-2.5G |
|---|---|---|---|---|---|---|
| Brand | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | Renesas Electronics | onsemi |
| Package | SC-64 (MP-3) | SC-64 (MP-3) - same | SC-64 (MP-3) - same | SC-64 (MP-3) - same | SC-64 (MP-3) - same | DPAK (TO-252) - different package (same 3-pin pinout) |
| Output Voltage | 2.5 V (typ.) | 3.3 V | 5.0 V | 1.8 V | 2.5 V | 2.5 V |
| Output Current | 1 A | 1 A | 1 A | 1 A | 1 A | 1 A |
| Regulator Type | LDO, Fixed Positive | LDO, Fixed Positive | LDO, Fixed Positive | LDO, Fixed Positive | LDO, Fixed Positive | LDO, Fixed Positive |
| Output Type | Fixed (no external resistors) | Fixed | Fixed | Fixed | Fixed | Fixed |
| Lead-Free / RoHS | Yes (RoHS compliant per '-AZ' suffix) | Yes | Yes | Yes | Plausibly not lead-free (no -AZ suffix) | Yes |
| Life Cycle Status | Active | Active (Renesas existing-customer program) | Active | Active | Active | Active |
| Notes on Drop-In | - | Same SC-64 footprint, requires 3.3 V bias re-targeting | Same SC-64 footprint, requires 5 V bias re-targeting | Same SC-64 footprint, requires 1.8 V bias re-targeting | Same SC-64 footprint, electrically identical 2.5 V | DPAK footprint - PCB rework required |
Principaux différenciateurs
- Same-family companion for adjacent voltage rails (vs UPC2933BHB-AZ (3.3 V))
- Lead-free/RoHS-compliant by default (vs UPC2925BHB (base part, no -AZ suffix))
- Fixed 2.5 V output for DDR termination voltage (vs Adjustable LDO with external feedback resistors)
Notes de conception
Estimated: at V_IN=5 V, V_OUT=2.5 V, I_OUT=1 A, the regulator dissipates roughly 2.5 W continuously. The SC-64 package thermal resistance theta_JA is not published in the retrieved distributor summary; obtain the manufacturer datasheet figure and confirm junction temperature rise stays below the datasheet maximum before deployment. At 2.5 W in still air a clip-on heatsink or top-side copper thermal relief is recommended.
Place the input bypass capacitor as close as possible to the VIN pin and the output capacitor as close as possible to the VOUT pin. Use low-ESR ceramic or tantalum capacitors satisfying the stability ESR window specified in the manufacturer datasheet. Route the ground pin directly to a wide ground plane, particularly when using the metal tab of SC-64 as a thermal/ground anchor.
Three-terminal LDOs of this class require output capacitance within a specific ESR window to remain stable. Oscillation can occur with ceramic-only output capacitors whose ESR is too low. Mitigation: a small series resistor or a tantalum capacitor with appropriate ESR per the datasheet, or add a feed-forward bypass. Also verify the maximum input voltage absolute maximum rating from the datasheet before connecting to a 12 V or 24 V bus.
Informations de conformité
RoHS compliance and lead-free finish are inferred from the '-AZ' Renesas suffix convention and confirmed via the Ampheo 'RoHS' tag and the DigChip specifications summary. REACH, halogen-free, and conflict-minerals compliance were not present in the retrieved data and are marked unknown.
