My Inquiry
My Account
onsemi CS5174ED8G
- Part No.:
- CS5174ED8G
- Manufacturer:
- onsemi
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
CS5174ED8G.pdf
- Description:
- IC REG BUCK BOOST ADJ 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,817
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
CS5174ED8G from onsemi is a 560 kHz, negative-feedback switching boost regulator with integrated 1.5 A NPN power switch, operating from 2.7 V to 30 V input and regulating negative output voltages referenced to −2.45 V at the NFB pin. It features current-mode control, thermal shutdown with 25°C hysteresis, frequency foldback during overcurrent, and supports flyback, SEPIC, and inverting topologies in industrial power supplies.
For engineers reviewing the CS5174ED8G datasheet, pinout, applications, or equivalent options, key selection criteria include its −2.45 V NFB reference voltage, 560 kHz base switching frequency, SOIC-8 package with PGND/VSW separation for noise isolation, and compatibility with negative-output DC/DC designs requiring <100 µA shutdown current and 0.65 V minimum pulse width.
Technical Context
The CS5174ED8G implements current-mode control using an internal ramp derived from switch current, combined with oscillator-slope compensation to prevent subharmonic oscillation above 50% duty cycle. Its dual-error-amplifier architecture includes a negative-input transconductance amplifier (160 µS typ) referenced to −2.45 V and clamped VC output (0.5–1.7 V).
Frequency synchronization operates up to 1000 kHz via the SS pin, while shutdown is triggered at 0.85 V (typ) with 12–200 µs delay depending on VCC. The IC integrates overcurrent protection with 1.7 A (min) current limit at 80% duty cycle and thermal shutdown at 180°C (typ) with hysteresis.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switching Frequency | 560 kHz nominal; enables compact magnetics and reduces EMI filtering burden vs. 280 kHz alternatives |
| NFB Reference Voltage | −2.45 V (typ); sets regulated negative output voltage via external resistor divider |
| Integrated Switch Current | 1.5 A guaranteed; eliminates external MOSFET driver and gate drive components | Input Voltage Range | 2.7 V to 30 V; supports wide-range industrial inputs including 12 V and 24 V rails |
| Shutdown Current | 60 µA max at 12–30 V VCC; enables low-power standby in battery-backed systems |
| Thermal Shutdown Threshold | 180°C (typ); protects against sustained overload with 25°C hysteresis for stable recovery |
| Minimum Pulse Width | 250 ns (typ); allows precise duty-cycle control at high frequencies and light loads |
Pinout & Package
CS5174ED8G is housed in an SOIC-8 (Case 751) package with exposed thermal pad (D suffix), featuring separate analog ground (AGND) and power ground (PGND) pins to minimize noise coupling into feedback circuitry.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VC | Loop compensation & current limit control | Output of error amplifier; clamped 0.5–1.7 V; external RC network sets stability and adjusts current limit |
| 2 - NFB | Negative feedback input | Senses negative output voltage; referenced to −2.45 V; triggers frequency foldback above −0.65 V |
| 3 - Test | Internal test logic interface | Must be floating or grounded; voltage between 2–6 V disables oscillator but leaves switch active |
| 4 - SS | Synchronization & shutdown | TTL-compatible input; low = shutdown (60 µA mode); external clock up to 1000 kHz synchronizes switching |
| 5 - VCC | Power supply input | 2.7–30 V operation; requires local bypass capacitor to AGND; powers internal regulator and driver |
| 6 - AGND | Analog ground reference | Clean return for FB/NFB, VC, and error amplifier; must be isolated from high-current PGND paths |
| 7 - PGND | Power ground return | Emitter connection for internal NPN switch; carries full 1.5 A switch current; connects to PCB ground plane |
| 8 - VSW | Switch collector node | Connects to inductor/diode in boost; withstands 40 V transient; layout must minimize trace inductance |
Key Features
| Feature | Design Value |
|---|---|
| Current-mode control with slope compensation | Enables stable operation >50% duty cycle without external compensation; improves line/load transient response |
| Separate AGND and PGND pins | Reduces noise coupling from switching currents into feedback path, improving regulation accuracy |
| Frequency foldback under overload | Reduces switching frequency to 20% of nominal when NFB > −0.65 V, limiting stress on external components |
| Integrated 1.5 A NPN switch with 0.55 V VCE(sat) | Lowers conduction losses and eliminates external transistor, driver, and associated passive components |
| −2.45 V NFB reference with 0.01%/V line regulation | Ensures tight negative output voltage tolerance across full 2.7–30 V input range |
Applications
| Industrial Negative Bias Supply | Automotive Camera Power Module |
|---|---|
Use Scenario: Generating −5 V or −12 V bias for op-amps, ADCs, and RS-232 transceivers in PLC I/O modules. IC Role / Device Role / Timing Role: Primary negative-output DC/DC controller implementing inverting topology with current-mode regulation. Use Value: Eliminates need for isolated DC/DC or charge-pump ICs; achieves ±1% output regulation over temperature using −2.45 V NFB reference. |
Use Scenario: Providing regulated −3.3 V rail for CMOS image sensor bias in automotive ADAS cameras. IC Role / Device Role / Timing Role: Compact boost-derived inverter delivering stable negative voltage from 12 V vehicle battery with load dump immunity. Use Value: 30 V absolute max input rating and thermal shutdown protect against automotive transients; 560 kHz operation minimizes solution size in space-constrained camera housings. |
| Medical Sensor Signal Conditioning | Test Equipment Auxiliary Rail |
Use Scenario: Powering precision instrumentation amplifiers and analog front-ends in portable ECG monitors. IC Role / Device Role / Timing Role: Low-noise negative supply generator using separate AGND/PGND routing and VC-loop compensation. Use Value: 0.01%/V NFB line regulation and 25°C thermal hysteresis ensure stable bias under varying battery voltage and ambient conditions. |
Use Scenario: Creating programmable negative auxiliary rails in benchtop power analyzers and signal generators. IC Role / Device Role / Timing Role: Synchronizable boost-inverter core enabling phase-aligned multi-rail generation with external clock. Use Value: SS pin supports 1000 kHz sync capability, allowing coordinated switching across multiple CS5174ED8G units to reduce system-level EMI peaks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative-output switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LT1373CS8#PBF | Pin-to-pin compatible; 500 kHz switching; −2.5 V NFB reference; higher 2.5 A switch current; no frequency foldback | Supports higher output current but lacks overload frequency reduction; requires external soft-start | Choose LT1373CS8#PBF for >1.5 A loads where foldback is not required and board space allows larger inductor |
| TPS61086PW | 500 kHz; positive-feedback only; requires external inverting stage for negative output; 2 A switch; integrated soft-start | Cannot regulate negative voltage directly; needs additional inverting buck-boost or charge-pump stage | Choose TPS61086PW only when redesigning for positive-feedback architecture and adding external inversion |
Compared with LT1373CS8#PBF and TPS61086PW, CS5174ED8G uniquely delivers direct negative-output regulation in SOIC-8 with built-in frequency foldback and thermal hysteresis-critical for unattended industrial systems where overload protection and thermal recovery behavior are design-critical.
Availability
CS5174ED8G is available at Aetrix Electronics and suitable for industrial automation, automotive camera modules, and medical sensor power supplies requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for CS5174ED8G 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 is a global semiconductor supplier focused on energy-efficient electronics, delivering silicon solutions for automotive, industrial, cloud, and IoT applications with emphasis on reliability and sustainability.
The CS517x family was designed specifically for compact, high-efficiency non-isolated DC/DC conversion in cost-sensitive industrial and automotive systems-supporting boost, flyback, SEPIC, and inverting topologies with minimal external components.
FAQ
What is the function of the NFB pin on the CS5174ED8G?
The NFB pin on the CS5174ED8G serves as the negative feedback input, referenced internally to −2.45 V. It senses the scaled negative output voltage via an external resistor divider and drives the error amplifier to maintain regulation. When the NFB voltage exceeds −0.65 V, the IC reduces switching frequency to 20% of nominal to limit stress during overload or short-circuit conditions. This behavior is intrinsic to CS5174ED8G and differs from the FB pin used in positive-output variants like CS5173ED8G.
Does the CS5174ED8G support synchronization to an external clock?
Yes, the CS5174ED8G supports external synchronization via its SS (Sync/Shut Down) pin, accepting TTL-compatible signals up to 1000 kHz. When an external clock is applied, the internal oscillator resets on each rising edge, aligning switching edges across multiple CS5174ED8G units. This capability is confirmed in the Electrical Characteristics table under "Sync Range" and enables EMI reduction in multi-rail systems without modifying the CS5174ED8G's internal timing architecture.
What is the maximum allowable voltage on the VSW pin of the CS5174ED8G?
The VSW pin of the CS5174ED8G has an absolute maximum rating of 40 V, as specified in the Maximum Ratings table. This rating applies to transient spikes during switch turn-off, particularly in flyback or SEPIC topologies where leakage inductance can generate voltage overshoot. Designers must ensure that the sum of output voltage, diode forward drop, and expected ringing stays below 40 V-exceeding this risks permanent damage to the internal NPN switch, regardless of duration or duty cycle.
How does thermal shutdown operate in the CS5174ED8G?
The CS5174ED8G activates thermal shutdown at 180°C (typical junction temperature), halting switching and reducing supply current to ~60 µA. Recovery occurs only after junction temperature falls by 25°C (hysteresis), ensuring stable restart without oscillation. This behavior is verified in the Thermal Shutdown section of the Electrical Characteristics table and Figure 19 (Shutdown Threshold vs. Temperature), making CS5174ED8G suitable for sealed enclosures or high-ambient environments where sustained thermal stress is likely.
Can the CS5174ED8G be used in a boost configuration to generate a negative output voltage?
No-the CS5174ED8G cannot generate negative output in standard boost topology, which inherently produces positive output. Instead, it is used in inverting configurations (e.g., inverting buck-boost or Ćuk) where the output polarity is opposite the input. The NFB pin and internal negative error amplifier are explicitly designed for sensing and regulating negative outputs in those topologies, as detailed in the Applications Information section and Figure 29 (Error Amplifier Equivalent Circuit). Using CS5174ED8G in basic boost would result in incorrect regulation or failure to start.
CS5174ED8G Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Negative
- Topology:
- Buck, Boost, Flyback, Forward Converter, SEPIC
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.7V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- -2.45V
- Voltage - Output (Max):
- -40V (Switch)
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 560kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- -40°C ~ 125°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
CS5174ED8G FAQ
1.How can I place an order for CS5174ED8G through Aetrix?
Please submit a Request for Quotation (RFQ) for CS5174ED8G 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 CS5174ED8G reliable?
The price and inventory of CS5174ED8G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CS5174ED8G is usually 5 days.
3.What payment methods are accepted for CS5174ED8G?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CS5174ED8G transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CS5174ED8G?
CS5174ED8G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CS5174ED8G 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 CS5174ED8G?
For technical support, including CS5174ED8G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CS5174ED8G requirements.
6.How does Aetrix verify that CS5174ED8G is sourced from the original manufacturer or authorized distributors?
All CS5174ED8G 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 CS5174ED8G meets industry standards.
7.What is the process for return or replacement of CS5174ED8G?
All CS5174ED8G units undergo pre-shipment inspection (PSI). If there is an issue with CS5174ED8G, 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 CS5174ED8G part is unused and in its original packaging.
Return procedure for CS5174ED8G:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
CS5174ED8G Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
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…
