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STMicroelectronics ST662ACD-TR
- Part No.:
- ST662ACD-TR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST662ACD-TR.pdf
- Description:
- IC REG CHARG PUMP 12V 30MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,474
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Product details
Overview
ST662ACD-TR from STMicroelectronics is a regulated charge pump DC-DC converter designed to generate a stable 12V ±5% output from a 4.5–5.5V input supply, delivering up to 30mA for byte-wide flash memory programming. It features logic-controlled shutdown (1µA quiescent current), requires only external capacitors (no inductor), and uses SO-8 packaging.
For engineers reviewing the ST662ACD-TR datasheet, ST662ACD-TR pinout, ST662ACD-TR application, or ST662ACD-TR equivalent, key selection criteria include guaranteed 12V regulation under load, CMOS-compatible active-high shutdown, capacitor-only topology, and thermal performance in industrial ambient conditions.
Technical Context
The ST662ACD-TR implements a voltage-tripling charge pump architecture using two external flying capacitors (C1, C2) and internal CMOS switches controlled by a 400kHz oscillator. Output regulation is maintained via an internal error amplifier that disables oscillation when VOUT exceeds 12.6V.
Shutdown is implemented with an internally pulled-up SHDN pin; pulling it low enables operation (VOUT = 12V), while driving it high disables the oscillator and forces VOUT = VCC. Switch impedance is specified at 1–2kΩ, and efficiency reaches 72% at 5V input and 30mA load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V ±5% (11.4–12.6V) across 0–30mA load and 4.75–5.5V input - ensures reliable flash programming voltage margin |
| Max Output Current | 30mA continuous - sufficient for standard byte-wide NOR/NAND flash VPP programming |
| Input Voltage Range | 4.5V to 5.5V - compatible with 5V logic rails and tolerates typical USB/SMPS ripple |
| Quiescent Current | 100µA typical (500µA max) - enables low-power standby in battery-backed systems |
| Shutdown Current | 1µA typical (10µA max) - minimizes system leakage during deep sleep modes |
| Oscillator Frequency | 400kHz - determines charge pump switching speed and capacitor sizing requirements |
| Power Efficiency | 72% at 5V/30mA - defines thermal dissipation and input supply loading in sustained operation |
Pinout & Package
ST662ACD-TR is housed in an SO-8 surface-mount package (5.00 × 4.00 mm body, 1.27 mm pitch), rated for -40°C to +85°C operation and 20°C/W junction-to-case thermal resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (C1–) | Negative terminal of first flying capacitor | Return path for C1 during charge phase; must be connected directly to C1– with minimal trace inductance |
| 2 (C1+) | Positive terminal of first flying capacitor | Node switched between VCC and C2– during pump cycle; critical for charge transfer integrity |
| 3 (C2–) | Negative terminal of second flying capacitor | Common node between C1+ and C2– during series stacking; layout-sensitive low-impedance node |
| 4 (C2+) | Positive terminal of second flying capacitor | Output of stacked charge pump stage; feeds VOUT through internal rectification |
| 5 (VCC) | Main power supply input | 4.5–5.5V source; powers internal logic, oscillator, and switch drivers |
| 6 (VOUT) | Regulated 12V output | Delivers up to 30mA; drops to VCC level during shutdown - not isolated |
| 7 (GND) | Analog and power ground reference | Single-point return for all internal circuits; must be tied to low-noise system ground plane |
| 8 (SHDN) | Active-high CMOS shutdown control | Internally pulled up to VCC; drive low for normal operation, high for 1µA shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| Inductorless charge pump topology | Eliminates magnetic components and EMI concerns - simplifies PCB layout for space-constrained embedded designs |
| CMOS-compatible shutdown interface | Direct connection to microcontroller GPIO without level-shifting - reduces BOM count and routing complexity |
| Internal 400kHz oscillator | Fixed-frequency operation enables predictable capacitor sizing and noise spectrum placement |
| 12V ±5% regulation over full load/temperature | Meets JEDEC flash programming voltage tolerance requirements without external feedback adjustment |
| Low 1µA shutdown current | Extends battery life in portable programmers and enables zero-power retention during firmware updates |
Applications
| Flash Memory Programming Supply | Embedded Microcontroller Auxiliary Power |
|---|---|
Use Scenario: Providing VPP programming voltage to parallel NOR flash devices during firmware update cycles in industrial controllers. IC Role / Device Role / Timing Role: Regulated 12V charge pump converter supplying precise programming voltage synchronized with write enable timing. Use Value: Guarantees 11.4–12.6V across temperature and load, eliminating need for discrete regulator + boost circuitry. | Use Scenario: Generating auxiliary 12V rail for EEPROM write-enable circuitry in automotive body control modules. IC Role / Device Role / Timing Role: On-demand high-voltage supply activated only during non-volatile memory writes, minimizing system power draw. Use Value: 1µA shutdown current prevents battery drain during extended vehicle sleep modes. |
| Portable Firmware Programmer | Industrial PLC I/O Module Power |
Use Scenario: Compact USB-powered flash programmer requiring self-contained 12V generation from 5V bus. IC Role / Device Role / Timing Role: Primary VPP source enabling field reprogramming without external DC-DC modules. Use Value: SO-8 footprint and capacitor-only design supports sub-10cm² PCB area for handheld tools. | Use Scenario: Isolated 12V supply for optocoupler biasing and sensor excitation in programmable logic controller backplanes. IC Role / Device Role / Timing Role: Secondary regulated rail decoupled from main 5V logic supply to reduce noise coupling into analog inputs. Use Value: 72% efficiency and 20°C/W thermal resistance allow continuous operation within 85°C industrial enclosure limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Fixed ±10V dual-output charge pump; no shutdown pin; 20mA per rail; requires two external capacitors | Designed for op-amp dual-supply biasing, not single-rail flash programming | Select only if dual ±10V needed and shutdown not required |
| TPS60403DBVR | 12V output, 60mA capability, 1.2MHz switching, integrated soft-start; no shutdown pin; requires three external capacitors | Higher current and frequency suit faster programming but lacks logic-controlled disable | Prefer when >30mA or faster transient response is required and shutdown control is handled externally |
Compared with MAX680ESA+ and TPS60403DBVR, ST662ACD-TR uniquely combines 12V single-rail output, 30mA capability, active-high shutdown, and capacitor-only implementation - making it optimal for compact, low-quiescent flash programming supplies where pin count and layout simplicity are critical.
Availability
ST662ACD-TR is available at Aetrix Electronics and suitable for flash memory programming supplies, embedded microcontroller auxiliary power, and portable firmware programmers requiring stable component supply and tape-and-reel delivery for automated assembly.
Supply support for ST662ACD-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in power management, microcontrollers, and analog ICs for industrial, automotive, and consumer markets.
The ST662A product line targets low-power, inductorless DC-DC conversion for memory programming and auxiliary voltage generation in space-constrained embedded systems.
FAQ
What external components are mandatory for ST662ACD-TR operation?
The ST662ACD-TR requires four external capacitors: two 0.22µF ceramic flying capacitors (C1, C2), one 4.7µF input capacitor (C3), and one 4.7µF output capacitor (C4). A 0.1µF ceramic decoupling capacitor (C5) is recommended near VCC/GND for noise suppression but may be omitted in low-noise-tolerance applications.
How does the shutdown function affect output voltage behavior?
When SHDN is driven high (≥2.4V), the internal oscillator halts and VOUT collapses to VCC level (not 0V). When SHDN is low (≤0.4V), the device operates normally and regulates VOUT to 12V ±5%. The internal pull-up ensures default operation if SHDN is left unconnected.
Can ST662ACD-TR drive multiple flash devices simultaneously?
Yes - the ST662ACD-TR can supply up to 30mA continuously. Driving multiple flash devices is feasible if their combined VPP current demand stays within this limit. For higher loads, STMicroelectronics documents parallel operation of two ST662A devices with shared or split external capacitors.
Is ST662ACD-TR qualified for industrial temperature range?
Yes - the ST662ACD-TR variant is rated for operation from -40°C to +85°C ambient temperature, matching the AB-series specification. This is confirmed by its SO-8 mechanical data sheet and absolute maximum ratings table, which specify TA = -40 to 85°C for the AC grade.
ST662ACD-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Up
- Output Configuration:
- Positive
- Topology:
- Charge Pump
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 4.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 12V
- Voltage - Output (Max):
- -
- Current - Output:
- 30mA
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ST662ACD-TR FAQ
1.How can I place an order for ST662ACD-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST662ACD-TR 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 ST662ACD-TR reliable?
The price and inventory of ST662ACD-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST662ACD-TR is usually 5 days.
3.What payment methods are accepted for ST662ACD-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST662ACD-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST662ACD-TR?
ST662ACD-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST662ACD-TR 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 ST662ACD-TR?
For technical support, including ST662ACD-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST662ACD-TR requirements.
6.How does Aetrix verify that ST662ACD-TR is sourced from the original manufacturer or authorized distributors?
All ST662ACD-TR 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 ST662ACD-TR meets industry standards.
7.What is the process for return or replacement of ST662ACD-TR?
All ST662ACD-TR units undergo pre-shipment inspection (PSI). If there is an issue with ST662ACD-TR, 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 ST662ACD-TR part is unused and in its original packaging.
Return procedure for ST662ACD-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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