My Inquiry
My Account
onsemi CS8481YDP5
- Part No.:
- CS8481YDP5
- Manufacturer:
- onsemi
- Package:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Datasheet:
-
CS8481YDP5.pdf
- Description:
- IC REG LINEAR FIXED LDO REG
- Quantity:
- Payment:
- Shipping:
Inventory:1,642
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CS8481YDP5 from onsemi is a dual-output micropower linear voltage regulator with a 3.3 V/250 mA primary output (VOUT1) and a 5.0 V/100 mA secondary output (VOUT2), both featuring ≤600 mV dropout, ±3.0% output tolerance, and ENABLE-controlled primary output activation. It delivers robust protection including −15 V reverse battery, 74 V peak transient, short-circuit, overtemperature (150°C trip), and 34 V overvoltage shutdown - designed for automotive body electronics and industrial control modules requiring stable dual-rail power under harsh supply conditions.
For engineers reviewing the CS8481YDP5 datasheet, pinout, applications, or equivalent options, key selection considerations include its D2PAK−5 package thermal performance (RJC = 2.4°C/W), ENABLE logic-level compatibility (0.8 V low / 2.0 V high threshold), reverse current limits (<1.5 µA at VOUT1), and dual-output quiescent current behavior (100 µA with VOUT1 disabled).
Technical Context
The CS8481YDP5 integrates two independent LDO regulators sharing a common ground and thermal shutdown circuitry, with VOUT2 powering internal bias circuits - meaning VOUT1 collapses if VOUT2 is overloaded. Its ENABLE input directly gates the primary output stage without affecting VOUT2, which remains always-on.
Protection is implemented per-output: reverse-battery tolerance applies to VIN only; overvoltage shutdown triggers at 30–38 V on VIN; short-circuit current limiting is asymmetric (400 mA typical for VOUT1, 200 mA for VOUT2); and thermal shutdown activates at 150–180°C junction temperature with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Primary Output | 3.3 V ±3.0%, 250 mA max - powers microcontrollers or CAN transceivers with tight regulation across load and line variation. |
| Secondary Output | 5.0 V ±3.0%, 100 mA max - supplies always-on logic, real-time clocks, or sensor biasing independent of ENABLE state. |
| Dropout Voltage | ≤600 mV at full load - enables operation down to 3.9 V input for 3.3 V rail and 5.6 V for 5.0 V rail in automotive cold-crank scenarios. |
| Quiescent Current | 100 µA with VOUT1 disabled - supports ultra-low-power standby modes in battery-backed systems. |
| Reverse Battery | −15 V tolerant on VIN - eliminates need for external reverse-polarity protection diode in 12 V automotive systems. |
| Peak Transient | 74 V survivability - withstands ISO 7637-2 Pulse 5a load dump without external TVS clamping. |
| Overvoltage Shutdown | 30–38 V VIN threshold - disables both outputs before internal damage occurs during alternator surge events. |
Pinout & Package
D2PAK−5 package (Case 936AC), surface-mount, tab-connected to GND for thermal conduction and EMI shielding.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1. VIN | Main unregulated input | Accepts 6–26 V DC input; rated for −15 V reverse and 74 V transient; feeds both regulators. |
| 2. VOUT1 | 3.3 V regulated output | Enabled only when ENABLE ≥2.0 V; current-limited to 400 mA; collapses if VOUT2 fails. |
| 3. GND | Power ground reference | Common return for both outputs and ENABLE; electrically tied to exposed tab for thermal path. |
| 4. VOUT2 | 5.0 V always-on output | Supplies internal bias; powers critical standby circuitry; unaffected by ENABLE state. |
| 5. ENABLE | CMOS-compatible enable input | Active-high control (0.8 V low / 2.0 V high); draws ≤2 µA; no pull-up required. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent LDOs | 3.3 V/250 mA + 5.0 V/100 mA outputs share thermal shutdown but have separate current limits and protections. |
| VOUT2-powered biasing | Eliminates need for external bias supply; ensures VOUT1 functionality depends on VOUT2 stability - informs system-level fault containment design. |
| Integrated reverse-battery protection | Withstands −15 V on VIN without external components - reduces BOM count and PCB area in automotive front-end power stages. |
| Asymmetric short-circuit response | VOUT1 limits at 400 mA, VOUT2 at 200 mA - allows differentiated load handling for high-current peripherals vs. low-power always-on functions. |
| Low reverse leakage | <1.5 µA reverse current at VOUT1 - prevents battery drain when input is disconnected in vehicle off-mode. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC I/O Power |
|---|---|
Use Scenario: Powering microcontroller core (3.3 V) and CAN transceiver (5.0 V) in a vehicle door module subject to load dump and cold-crank conditions. IC Role / Device Role / Timing Role: Dual-rail LDO regulator providing isolated, protected, and ENABLE-gated power domains. Use Value: Enables single-chip solution for 3.3 V logic and 5.0 V interface rails while surviving ISO 7637-2 transients and −40°C to +125°C ambient. | Use Scenario: Supplying field-side sensors (5.0 V) and isolated digital inputs (3.3 V) in a DIN-rail mounted programmable logic controller. IC Role / Device Role / Timing Role: Primary power conditioner delivering regulated, fault-protected DC rails from 24 V industrial bus. Use Value: Integrates reverse polarity, overvoltage, and thermal protection - reducing external protection component count by ≥4 devices. |
| Telematics Control Unit (TCU) | Smart Rearview Mirror System |
Use Scenario: Providing always-on 5.0 V power to GPS baseband IC and ENABLE-controlled 3.3 V to cellular modem in an automotive telematics unit. IC Role / Device Role / Timing Role: Dual-output regulator enabling low-power sleep mode via ENABLE while maintaining RTC and wake-up circuitry on VOUT2. Use Value: Achieves <100 µA system standby current with VOUT1 disabled - extending battery backup runtime during vehicle ignition-off periods. | Use Scenario: Powering display driver (3.3 V) and ambient light sensor interface (5.0 V) in an auto-dimming rearview mirror with integrated ADAS alerts. IC Role / Device Role / Timing Role: Compact dual-rail regulator supporting mixed-voltage analog/digital subsystems in space-constrained automotive interior modules. Use Value: D2PAK−5 package provides sufficient thermal margin (RJC = 2.4°C/W) for continuous 250 mA 3.3 V output in sealed plastic housing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS7H1101AQPWPRQ1 | Single 3.3 V output (no 5.0 V rail); requires external 5.0 V source; higher PSRR (75 dB @ 1 kHz). | Not suitable for standalone dual-rail systems; requires redesign to add second regulator or DC-DC converter. | Select only if system already provides 5.0 V and prioritizes ultra-low noise over integration. |
| NCP1117ST50T3G | Single 5.0 V output; no ENABLE; no reverse-battery or load-dump protection; TO-220 package. | Lacks VOUT1, ENABLE, and automotive-grade protection - requires ≥3 additional discrete protection components for equivalent ruggedness. | Use only in non-automotive, low-transient environments where cost is primary and dual-rail integration is unnecessary. |
Compared with TPS7H1101AQPWPRQ1 and NCP1117ST50T3G, the CS8481YDP5 uniquely delivers integrated dual-rail regulation with automotive-grade protection in one D2PAK−5 package - eliminating external protection components and simplifying layout for BCM, TCU, and industrial I/O designs.
Availability
CS8481YDP5 is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC I/O power supplies, telematics control units, and smart rearview mirror systems requiring stable component supply under AEC-Q100 stress conditions and extended temperature operation.
Supply support for CS8481YDP5 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
onsemi (formerly ON Semiconductor) is a global semiconductor supplier focused on energy-efficient electronics, with leadership in automotive, industrial, cloud, and IoT power management solutions.
The CS8481YDP5 belongs to onsemi's SMART REGULATOR™ family - engineered specifically for automotive and industrial applications demanding high reliability, integrated protection, and dual-output flexibility in harsh electrical environments.
FAQ
What is the maximum input voltage rating for the CS8481YDP5?
The CS8481YDP5 supports an absolute maximum input voltage of 30 V under normal operating conditions, with transient survivability up to 74 V per ISO 7637-2 Pulse 5a. The overvoltage shutdown activates between 30 V and 38 V to protect internal circuitry. Exceeding 30 V continuously risks permanent damage even if transient-rated events are within spec.
Does the CS8481YDP5 require external capacitors for stability?
Yes, the CS8481YDP5 requires external output capacitors for stability: minimum 22 µF with ESR < 8 Ω on both VOUT1 and VOUT2, plus a 0.1 µF ceramic capacitor on VIN. These must be rated for operation at −40°C to ensure stability across the full automotive temperature range. Omitting them causes oscillation and output instability.
How does the ENABLE function affect quiescent current in the CS8481YDP5?
When ENABLE is low, the CS8481YDP5 disables VOUT1 and reduces total quiescent current to typically 100 µA while still supplying 100 µA from VOUT2. When ENABLE is high and both outputs are active at full load, quiescent current rises to typically 22 mA - confirming that ENABLE directly controls not just output state but also major portions of internal bias current consumption.
Can the CS8481YDP5 operate with input voltages below 6.0 V?
No, the CS8481YDP5 is not specified to operate below 6.0 V input. Its minimum functional input is defined as 6.0 V in all electrical characteristics tables. Below this, VOUT1 regulation degrades rapidly, and VOUT2 may fail to sustain internal bias - leading to unpredictable ENABLE response and possible output collapse.
What thermal derating applies to the CS8481YDP5 in a D2PAK−5 package?
The CS8481YDP5 in D2PAK−5 has a typical junction-to-case thermal resistance (RJC) of 2.4°C/W. With a maximum junction temperature of 150°C and ambient up to 125°C, usable power dissipation is limited to ~10.4 W before thermal shutdown. Actual safe operating area depends on PCB copper area, airflow, and heatsinking - refer to RJA values (10–50°C/W) in the datasheet for layout-specific derating.
CS8481YDP5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- TO-263-6, D2PAK (5 Leads + Tab), TO-263BA
- Packaging:
- Bulk
- Product Status:
- Active
- Output Configuration:
- Positive
- Output Type:
- Fixed
- Number of Regulators:
- 2
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 3.3V, 5V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -, 0.6V @ 100mA
- Current - Output:
- 250mA, 100mA
- Current - Quiescent (Iq):
- 150 µA
- Current - Supply (Max):
- 50 mA
- PSRR:
- 70dB (120Hz)
- Control Features:
- Enable
- Protection Features:
- Over Temperature, Over Voltage, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- D2PAK-5
CS8481YDP5 FAQ
1.How can I place an order for CS8481YDP5 through Aetrix?
Please submit a Request for Quotation (RFQ) for CS8481YDP5 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 CS8481YDP5 reliable?
The price and inventory of CS8481YDP5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS8481YDP5 is usually 5 days.
3.What payment methods are accepted for CS8481YDP5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS8481YDP5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS8481YDP5?
CS8481YDP5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS8481YDP5 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 CS8481YDP5?
For technical support, including CS8481YDP5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS8481YDP5 requirements.
6.How does Aetrix verify that CS8481YDP5 is sourced from the original manufacturer or authorized distributors?
All CS8481YDP5 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 CS8481YDP5 meets industry standards.
7.What is the process for return or replacement of CS8481YDP5?
All CS8481YDP5 units undergo pre-shipment inspection (PSI). If there is an issue with CS8481YDP5, 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 CS8481YDP5 part is unused and in its original packaging.
Return procedure for CS8481YDP5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CS8481YDP5 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
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
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…
