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STMicroelectronics ST662ABD
- Part No.:
- ST662ABD
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST662ABD.pdf
- Description:
- IC REG CHARG PUMP 12V 30MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,384
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Product details
Overview
ST662ABD 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 for byte-wide flash memory programming. It delivers up to 30mA continuous output current, features logic-controlled shutdown (1µA quiescent), and requires only ceramic capacitors-no inductor. Its SO-8 package supports surface-mount integration in embedded memory subsystems.
For engineers reviewing the ST662ABD datasheet, ST662ABD pinout, ST662ABD application, or ST662ABD equivalent, key selection criteria include guaranteed 12V regulation under 30mA load, CMOS-compatible active-high SHDN control, shutdown current ≤10µA, oscillator frequency of 400kHz, and 72% efficiency at full load-critical for low-noise, inductor-free voltage boosting in space-constrained designs.
Technical Context
The ST662ABD implements a two-stage switched-capacitor voltage tripler using internal CMOS switches and external C1/C2 flying capacitors. Its error amplifier monitors VOUT and disables the 400kHz oscillator when regulation is achieved, enabling precise 12V output across temperature and load.
Shutdown is implemented via an internally pulled-up SHDN pin: grounding it enables normal operation; pulling it high disables both charge pumps, forcing VOUT = VCC and reducing supply current to ≤10µA. The device operates without magnetic components, relying on fast capacitor charge/discharge cycles with di/dt-sensitive layout requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V ±5% (11.4–12.6V) regulated over 0–30mA load and −40°C to +85°C ambient |
| Input Voltage Range | 4.5V to 5.5V - compatible with standard 5V logic rails and tolerant of ±5% supply variation |
| Max Output Current | 30mA continuous - sufficient to program common parallel NOR flash devices requiring 12V VPP |
| Quiescent Current | 100–500µA - enables low-power standby in battery-backed or always-on memory subsystems |
| Shutdown Current | 1–10µA - reduces system-level leakage during firmware update idle periods |
| Oscillator Frequency | 400kHz - determines charge pump switching speed and ripple frequency; sets minimum capacitor size |
| Power Efficiency | 72% at 5V input, 30mA load - balances thermal performance and board area vs. inductor-based alternatives |
Pinout & Package
ST662ABD is housed in an SO-8 (Small Outline, 8-pin) surface-mount package per mechanical drawing 0016023/C, with 1.27mm pitch, 4.8–5.0mm width, and 3.8–4.0mm body length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1− | Negative terminal of first flying capacitor | Return path for C1 during charge phase; must be routed with minimal loop inductance |
| 2 C1+ | Positive terminal of first flying capacitor | Node connected to internal switch S1; forms first stage of voltage doubling |
| 3 C2− | Negative terminal of second flying capacitor | Common node between C1 and C2 during series stacking; critical for ripple suppression |
| 4 C2+ | Positive terminal of second flying capacitor | Output node of second stage; connects to VOUT through internal series switch configuration |
| 5 VCC | Main supply input | 4.5–5.5V power source; also supplies internal logic and pull-up on SHDN |
| 6 VOUT | Regulated 12V output | Delivers 30mA; drops to VCC level during shutdown; requires low-ESR C4 (≥4.7µF tantalum or ceramic) |
| 7 GND | Analog and power ground reference | Single-point return for all capacitors and internal circuitry; layout isolation prevents noise coupling |
| 8 SHDN | Active-high CMOS shutdown control | Internally pulled up to VCC; drive low for operation, high for 1µA shutdown mode |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor architecture | Eliminates EMI-prone magnetics and simplifies PCB layout for compact flash programming circuits |
| CMOS-compatible shutdown | Direct interface to microcontroller GPIO without level-shifting; <10µA shutdown current extends system sleep time |
| Stable 12V regulation | Maintains ±5% accuracy across 0–30mA load and −40°C to +85°C, meeting JEDEC flash VPP specs |
| Internal oscillator & control | Fixed 400kHz switching eliminates external timing components while enabling predictable ripple filtering |
| Low-ESR capacitor support | Accepts ceramic (2µF/1µF) or tantalum (4.7µF) for C1/C2/C4 - reduces board area and cost vs. electrolytic solutions |
Applications
| Flash Memory Programming Supply | Embedded Microcontroller Bootloader Interface |
|---|---|
|
Use Scenario: Providing 12V VPP to parallel NOR flash during firmware update or factory programming. IC Role / Device Role / Timing Role: Regulated charge pump delivering precise 12V ±5% at up to 30mA, synchronized to MCU write enable timing. Use Value: Enables in-system programming without external DC-DC modules, reducing BOM count and PCB footprint by 40% vs. inductor-based solutions. |
Use Scenario: Supplying 12V to microcontroller's internal flash programming circuitry during secure boot validation. IC Role / Device Role / Timing Role: On-demand voltage booster activated only during flash write cycles, controlled via MCU GPIO-driven SHDN. Use Value: Reduces average system power by >95% during idle-quiescent current stays below 500µA until programming begins. |
| Industrial PLC Configuration Memory | Smart Card Reader EEPROM Programming |
|
Use Scenario: Powering nonvolatile configuration storage in programmable logic controllers operating across −40°C to +85°C. IC Role / Device Role / Timing Role: Temperature-stable 12V source for EEPROM write pulses, maintaining regulation despite wide input rail drift. Use Value: Guarantees reliable write completion over full industrial temperature range without derating or thermal throttling. |
Use Scenario: Generating 12V for contact-based smart card EEPROM programming in portable readers. IC Role / Device Role / Timing Role: Low-noise, capacitor-only voltage booster triggered only during card insertion and write sequence. Use Value: Meets ISO/IEC 7816-3 transient voltage requirements while eliminating inductor-induced EMI near RF antenna circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump voltage booster applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Generates ±10V dual outputs; no integrated shutdown control; 100µA quiescent current | Requires external logic for enable/disable; unsuitable for single-rail 12V-only systems | Select when dual-polarity bias is needed; avoid if SHDN interface or 12V-only output is required |
| TC7660SCOA | Unregulated voltage doubler (VOUT ≈ 2×VIN); no feedback loop; 170µA quiescent current | Output varies with input and load; cannot meet ±5% 12V spec without external regulation | Use only for non-critical bias generation; not acceptable for flash VPP compliance |
Compared with MAX680ESA+ and TC7660SCOA, ST662ABD uniquely provides regulated 12V output with integrated shutdown, making it the only drop-in solution for JEDEC-compliant flash programming where precision, low leakage, and single-supply operation are mandatory.
Availability
ST662ABD is available at Aetrix Electronics and suitable for flash memory programming supplies, embedded bootloader interfaces, and industrial configuration memory systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ST662ABD 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 automotive, industrial, and embedded power management ICs with broad manufacturing and quality certifications.
The ST662 product line was developed specifically for inductor-free, high-accuracy voltage boosting in memory programming applications-targeting space-constrained, low-EMI embedded systems where reliability across −40°C to +85°C is essential.
FAQ
What capacitor types and values are mandatory for stable ST662ABD operation?
The ST662ABD requires C1 and C2 as 0.22µF ceramic flying capacitors, C3 (input) ≥4.7µF tantalum or low-ESR electrolytic, C4 (output) ≥4.7µF tantalum or 1µF ceramic, and C5 (decoupling) 0.1µF ceramic placed adjacent to pins 5 and 7. Ceramic variants reduce size but require strict layout adherence to minimize parasitic inductance.
Can ST662ABD operate from a 3.3V input to generate 12V?
No. ST662ABD has a specified input voltage range of 4.5V to 5.5V. Operation below 4.5V violates absolute maximum ratings and causes failure to regulate 12V output-even at zero load-as confirmed by electrical characteristics tables showing VO minima only at VCC ≥4.75V.
How does the SHDN pin behave when left unconnected?
SHDN is internally pulled up to VCC, so an unconnected pin defaults to high logic state, placing the device in shutdown mode with VOUT = VCC and supply current ≤10µA. To enable operation, SHDN must be actively driven low by an external controller or pulled down via a resistor.
Is ST662ABD RoHS compliant and halogen-free?
Yes. ST662ABD (SO-8 package) conforms to RoHS Directive 2011/65/EU and is manufactured as a halogen-free device per STMicroelectronics' specification document "ECOPACK® Definitions," with lead-free terminations and compliant molding compounds verified in production lots since 2006.
ST662ABD Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tube
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ST662ABD FAQ
1.How can I place an order for ST662ABD through Aetrix?
Please submit a Request for Quotation (RFQ) for ST662ABD 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 ST662ABD reliable?
The price and inventory of ST662ABD are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST662ABD is usually 5 days.
3.What payment methods are accepted for ST662ABD?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST662ABD transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST662ABD?
ST662ABD orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST662ABD 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 ST662ABD?
For technical support, including ST662ABD datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST662ABD requirements.
6.How does Aetrix verify that ST662ABD is sourced from the original manufacturer or authorized distributors?
All ST662ABD 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 ST662ABD meets industry standards.
7.What is the process for return or replacement of ST662ABD?
All ST662ABD units undergo pre-shipment inspection (PSI). If there is an issue with ST662ABD, 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 ST662ABD part is unused and in its original packaging.
Return procedure for ST662ABD:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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