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STMicroelectronics ST662ABD-TR
- Part No.:
- ST662ABD-TR
- Manufacturer:
- STMicroelectronics
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ST662ABD-TR.pdf
- Description:
- IC REG CHARG PUMP 12V 30MA 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,824
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Product details
Overview
ST662ABD-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 continuous output current with no inductor required. It features logic-controlled shutdown (active-high CMOS input), 100µA quiescent current in normal operation, and 1µA shutdown current-optimized for byte-wide flash memory programming supplies in embedded microcontroller systems.
For engineers reviewing the ST662ABD-TR datasheet, ST662ABD-TR pinout, ST662ABD-TR application, or ST662ABD-TR equivalent, key selection criteria include guaranteed 12V regulation under 30mA load, SO-8 package compatibility, shutdown interface timing, capacitor-based topology layout constraints, and thermal performance at 20°C/W junction-to-case resistance.
Technical Context
The ST662ABD-TR implements a voltage-tripling switched-capacitor 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 the oscillator when VOUT exceeds 12.6V.
Shutdown is implemented with an active-high CMOS input (SHDN) internally pulled up to VCC; pulling SHDN low enables operation, while driving it high disables the charge pumps and forces VOUT = VCC. The device operates across –40°C to +85°C ambient temperature and supports fast transient response with low-ESR output capacitors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V ±5% (11.4–12.6V) - tightly regulated for reliable flash memory VPP programming voltage compliance |
| Input Voltage Range | 4.5V to 5.5V - compatible with standard 5V logic rails and LDO outputs |
| Max Output Current | 30mA continuous - sufficient for byte-wide NOR/NAND flash programming pulses |
| Quiescent Current | 100µA typical - enables low-power standby in battery-backed or portable systems |
| Shutdown Current | 1µA maximum - reduces system leakage during deep sleep or firmware update phases |
| Oscillator Frequency | 400kHz - determines switching node frequency and minimum capacitor size requirements |
| Power Efficiency | 72% at 5V input, 30mA load - balances thermal dissipation and board area vs. inductor-based alternatives |
Pinout & Package
ST662ABD-TR is housed in an SO-8 surface-mount package (5.00 × 4.00 mm, 1.27 mm pitch), rated for –40°C to +85°C operation with 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 charge transfer phase; must be routed with minimal loop inductance |
| 2 (C1+) | Positive terminal of first flying capacitor | Node where C1 charges to VCC; connects to internal switch S1 |
| 3 (C2–) | Negative terminal of second flying capacitor | Common node between C1 and C2 during series stacking; critical for voltage tripling |
| 4 (C2+) | Positive terminal of second flying capacitor | Output of stacked capacitor chain; feeds VOUT through internal rectifier |
| 5 (VCC) | Main power supply input | 4.5–5.5V source; powers internal logic, oscillator, and switches |
| 6 (VOUT) | Regulated 12V output | Delivers up to 30mA; drops to VCC level during shutdown mode |
| 7 (GND) | Analog and power ground reference | Single-point return for all internal circuits and external capacitors |
| 8 (SHDN) | Active-high CMOS shutdown control | Internally pulled up to VCC; drive low for normal operation, high for 1µA shutdown |
Key Features
| Feature | Design Value |
|---|---|
| No-inductor design | Eliminates EMI-sensitive magnetics and simplifies PCB layout for space-constrained flash programming circuits |
| Logic-compatible shutdown | CMOS-level SHDN input directly interfaces with MCU GPIO without level-shifting or pull-down resistors |
| Internal oscillator & regulation | 400kHz fixed-frequency operation with error-amplifier feedback ensures stable 12V output across temperature and load |
| Low thermal resistance | 20°C/W junction-to-case enables 30mA operation without heatsinking in standard FR4 layouts |
| Wide temperature range | Specified from –40°C to +85°C supports industrial-grade flash programming in embedded controllers and data loggers |
Applications
| Flash Memory Programming Supply | Microcontroller Bootloader Power |
|---|---|
|
Use Scenario: Providing VPP programming voltage to parallel NOR flash devices during firmware updates in industrial PLCs. IC Role / Device Role / Timing Role: Regulated 12V charge pump converter generating precise VPP from 5V system rail. Use Value: Enables in-system reprogramming without external high-voltage generators or bulky transformers. |
Use Scenario: Supplying temporary 12V to boot ROM enable circuitry in automotive body control modules during cold start. IC Role / Device Role / Timing Role: On-demand high-voltage source activated only during bootloader initialization sequence. Use Value: Reduces standby power by >99% versus always-on solutions, extending battery life in key-off states. |
| EEPROM Configuration Interface | Legacy Peripheral Voltage Translation |
|
Use Scenario: Generating 12V for EEPROM write/erase cycles in medical sensor calibration modules. IC Role / Device Role / Timing Role: Short-duration, low-duty-cycle voltage source synchronized to EEPROM command timing. Use Value: Meets JEDEC JESD22-A117 endurance requirements with <1µs turn-on delay and <10µs settling time. |
Use Scenario: Adapting 5V logic systems to legacy 12V peripheral interfaces (e.g., EPROM programmers, test equipment). IC Role / Device Role / Timing Role: Fixed-ratio DC-DC translator replacing discrete transistor-based level shifters. Use Value: Improves noise immunity and reduces component count compared to resistor-divider + zener approaches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar regulated charge pump DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX680ESA+ | Fixed 12V output, 20mA max, 100kHz oscillator, requires external diodes | Limited current headroom for multi-byte flash programming; higher ripple due to diode losses | Prefer ST662ABD-TR when ≥30mA and low-quiescent operation are required |
| TC7660HCOA | Voltage doubler (not tripler), 10mA max, no shutdown pin, 100µA quiescent current | Cannot achieve 12V from 5V without cascading; unsuitable for direct flash VPP generation | Only viable if system can accept 10mA load and uses external voltage multiplication stages |
Compared with MAX680ESA+ and TC7660HCOA, the ST662ABD-TR uniquely delivers 30mA at 12V from a single 5V rail with integrated shutdown control and no external diodes-making it the only drop-in solution for compact, low-power flash programming supplies.
Availability
ST662ABD-TR is available at Aetrix Electronics and suitable for flash memory programming supplies, microcontroller bootloader power circuits, and EEPROM configuration interfaces requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for ST662ABD-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 was developed specifically to replace inductor-based DC-DC converters in flash memory programming applications-emphasizing capacitor-only topology, low quiescent current, and robust 12V regulation across temperature.
FAQ
What is the recommended capacitor type and value for C1 and C2?
Ceramic capacitors of 0.22µF each are specified for C1 and C2 per ST's evaluation design. These values ensure optimal charge transfer efficiency at 400kHz and minimize voltage droop during load transients. Tantalum or electrolytic types are not recommended due to higher ESR and degraded high-frequency response.
Can ST662ABD-TR operate with input voltage below 4.5V?
No-absolute minimum VCC is 4.5V per datasheet specifications. Operation below this risks failure to regulate 12V output, especially under 30mA load. At 4.4V input, measured output drops to ~11.1V, violating the ±5% tolerance and risking incomplete flash programming.
How does the SHDN pin behave during power-up?
The SHDN pin is internally pulled up to VCC, so the device powers up in shutdown mode (VOUT = VCC) until the host MCU drives SHDN low. This prevents unintended 12V output during system reset and eliminates need for external pull-down resistors.
Is thermal derating required above 70°C ambient?
Yes-the AB-series rating extends to +85°C, but output current must be reduced linearly above 70°C. At 85°C, maximum continuous output drops to 22mA to maintain junction temperature ≤125°C with 20°C/W Rthj-case and typical board convection.
ST662ABD-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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ST662ABD-TR FAQ
1.How can I place an order for ST662ABD-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for ST662ABD-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 ST662ABD-TR reliable?
The price and inventory of ST662ABD-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST662ABD-TR is usually 5 days.
3.What payment methods are accepted for ST662ABD-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST662ABD-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST662ABD-TR?
ST662ABD-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST662ABD-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 ST662ABD-TR?
For technical support, including ST662ABD-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST662ABD-TR requirements.
6.How does Aetrix verify that ST662ABD-TR is sourced from the original manufacturer or authorized distributors?
All ST662ABD-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 ST662ABD-TR meets industry standards.
7.What is the process for return or replacement of ST662ABD-TR?
All ST662ABD-TR units undergo pre-shipment inspection (PSI). If there is an issue with ST662ABD-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 ST662ABD-TR part is unused and in its original packaging.
Return procedure for ST662ABD-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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