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STMicroelectronics ST662ABN
- Part No.:
- ST662ABN
- Manufacturer:
- STMicroelectronics
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ST662ABN.pdf
- Description:
- IC REG CHARGE PUMP 12V 30MA
- Quantity:
- Payment:
- Shipping:
Inventory:4,234
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Product details
Overview
ST662ABN 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 output current, features logic-controlled shutdown (1µA quiescent), and requires only external capacitors-no inductor. Its SO-8 package supports surface-mount integration in compact embedded programming supplies.
For engineers reviewing the ST662ABN datasheet, ST662ABN pinout, ST662ABN application, or ST662ABN equivalent, key selection criteria include guaranteed 12V regulation under 30mA load, CMOS-compatible active-high shutdown, capacitor-only topology, thermal performance at 85°C ambient, and compatibility with flash memory VPP supply requirements per JEDEC standards.
Technical Context
The ST662ABN implements a voltage-tripling charge pump architecture using two external flying capacitors (C1, C2) switched in alternating phases to step up 5V input to 12V output. An internal error amplifier monitors VOUT and disables the 400kHz oscillator when regulation is achieved, minimizing ripple and improving efficiency.
Its shutdown circuitry uses an internally pulled-up CMOS input (SHDN) that disables both charge pumps when driven low, forcing VOUT = VCC and reducing total supply current to 1µA. The device operates across –40°C to +85°C (AB series), with thermal resistance Rthj-case = 20°C/W and maximum power dissipation of 500mW.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | 12V ±5% (11.4–12.6V) regulated over 0–30mA load and 4.75–5.5V input - ensures reliable Flash VPP compliance. |
| Oscillator Frequency | 400kHz fixed - defines switching period for capacitor charge/discharge timing and EMI profile. |
| Quiescent Current | 100µA typical (max 500µA) - enables low-power operation during active programming standby. |
| Shutdown Current | 1µA typical (max 10µA) - minimizes system-level leakage when Flash is idle. |
| Efficiency | 72% at 5V input, 30mA load - balances power loss and thermal rise in space-constrained PCB layouts. |
| Switch Impedance | 1–2kΩ (RON-equivalent) - limits max output current per device and informs parallel-device scaling strategy. |
| Operating Temp | –40°C to +85°C - qualifies for industrial-grade Flash programming in embedded controllers and test equipment. |
Pinout & Package
ST662ABN is housed in an SO-8 (Small Outline-8) surface-mount package with standard 1.27mm pitch, 5.0mm width, and 4.0mm body length. Thermal resistance is 20°C/W junction-to-case, supporting continuous 30mA operation at +85°C ambient with minimal heatsinking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 C1− | Negative terminal of first flying capacitor | Return path during C1 charging phase; must be routed with low-inductance loop to minimize noise. |
| 2 C1+ | Positive terminal of first flying capacitor | Node connected to internal switch S1; forms half of voltage-doubling stage with C2. |
| 3 C2− | Negative terminal of second flying capacitor | Common node between C1 and C2 during series stacking; critical for voltage tripling integrity. |
| 4 C2+ | Positive terminal of second flying capacitor | Output node of stacked charge pump; feeds VOUT through internal rectification and filtering. |
| 5 VCC | Main supply input (4.5–5.5V) | Power source for internal oscillator, control logic, and switch drivers; requires local 4.7µF decoupling. |
| 6 VOUT | Regulated 12V output | Delivers programming voltage to Flash VPP pin; drops to VCC level during shutdown mode. |
| 7 GND | Ground reference | Common return for all internal circuits and external capacitors; must be low-impedance plane. |
| 8 SHDN | Active-high CMOS shutdown input | Internally pulled up to VCC; drive low for normal operation, high to enter 1µA shutdown state. |
Key Features
| Feature | Design Value |
|---|---|
| Capacitor-only topology | Eliminates inductors entirely - reduces BOM cost, board area, and EMI concerns in dense Flash controller layouts. |
| CMOS-compatible shutdown | Direct interface with microcontroller GPIO without level-shifting - simplifies control logic and firmware sequencing. |
| Voltage-tripling architecture | Generates 12V from 5V input using dual flying caps and internal switching - avoids transformer-based isolation complexity. |
| Thermal robustness | Rated for continuous operation at +85°C ambient with 500mW Ptot - supports uncooled deployment in industrial programmers. |
| Low-noise regulation | Error-amplifier feedback stabilizes VOUT within ±5% across temperature and load - meets JEDEC Flash VPP tolerance. |
Applications
| Flash Memory Programming Supply | Embedded Microcontroller Bootloader |
|---|---|
Use Scenario: Providing VPP programming voltage to parallel NOR Flash devices during firmware update cycles. IC Role / Device Role / Timing Role: Regulated 12V DC-DC converter supplying precise VPP during byte/word programming pulses. Use Value: Ensures JEDEC-compliant 12V ±5% VPP delivery at 30mA without inductor-induced ringing or layout sensitivity. | Use Scenario: Powering VPP pin of on-chip Flash during secure bootloader execution in automotive MCUs. IC Role / Device Role / Timing Role: On-demand high-voltage generator triggered by boot ROM before main application code execution. Use Value: 1µA shutdown current extends battery life during deep-sleep states while enabling fast VPP ramp-up on wake. |
| EEPROM In-Circuit Programmer | Industrial Test Equipment Power Module |
Use Scenario: Generating 12V for EEPROM write/erase operations in automated test fixtures. IC Role / Device Role / Timing Role: Standalone VPP source synchronized with I²C/SPI command sequences via SHDN control. Use Value: Eliminates need for external DC-DC modules - reduces fixture size and improves channel density. | Use Scenario: Compact 12V supply in benchtop Flash programmers handling multiple device families. IC Role / Device Role / Timing Role: Primary VPP regulator in multi-rail test head with thermal margin for 8-hour continuous operation. Use Value: SO-8 footprint and 20°C/W thermal resistance enable convection-cooled design without fans or heatsinks. |
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, 100mA capability, ±1.5% initial accuracy, 125kHz oscillator | Higher current and tighter regulation, but larger SO-8 footprint and higher quiescent current (250µA) | Preferred where >30mA Flash programming or tighter VPP tolerance is required. |
| TC7660SCOA | Voltage inverter (±VOUT), not booster; requires external resistors for regulation; no shutdown pin | Only suitable for unregulated negative rail generation - cannot replace ST662ABN's 12V positive boost function | Not a functional substitute; only considered if system redesign allows inverted topology and external regulation. |
Compared with MAX680ESA+ and TC7660SCOA, ST662ABN uniquely combines 30mA 12V boosting, 1µA shutdown, and capacitor-only implementation in a thermally optimized SO-8 package - making it the most direct fit for space- and power-constrained Flash VPP applications.
Availability
ST662ABN is available at Aetrix Electronics and suitable for flash memory programming supplies, embedded bootloader power modules, and industrial EEPROM test fixtures requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for ST662ABN 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, designing and manufacturing analog, mixed-signal, power, and microcontroller solutions for industrial, automotive, and consumer markets.
The ST662 product line targets low-cost, inductor-free high-voltage generation for non-volatile memory programming - emphasizing simplicity, reliability, and thermal resilience in embedded systems.
FAQ
What is the minimum input voltage required for ST662ABN to maintain 12V regulation at full 30mA load?
The ST662ABN maintains 12V ±5% regulation down to 4.75V input at 30mA load, as confirmed in the Electrical Characteristics table (page 3). Below 4.75V, output voltage droops linearly and falls outside specification; operation below 4.5V risks functional failure per Absolute Maximum Ratings.
Can ST662ABN be used to generate voltages other than 12V?
No - ST662ABN is a fixed 12V-output charge pump with internal feedback resistor network. The datasheet confirms no external resistor adjustment is supported. For higher outputs, STMicroelectronics recommends cascading two ST662ABN units (Figure 19) or using alternative topologies like boost converters with adjustable feedback.
Why does VOUT equal VCC during shutdown mode?
During shutdown, internal charge pumps and oscillator are disabled, disconnecting the voltage-tripling path. VOUT is then clamped to VCC via an internal diode (D1 referenced in Figure 10), ensuring safe, predictable behavior instead of floating or undefined voltage - critical for Flash device protection during idle states.
Which capacitor types and values are mandatory for stable ST662ABN operation?
Per Table 1 (page 7), ceramic flying capacitors C1/C2 (0.22µF each) are mandatory for proper charge transfer timing. Input capacitor C3 (4.7µF tantalum/electrolytic) and output capacitor C4 (4.7µF tantalum/electrolytic) are required for stability and ripple suppression; ceramic C5 (0.1µF) is recommended for high-frequency decoupling near pins 5 and 7.
ST662ABN Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- -
ST662ABN FAQ
1.How can I place an order for ST662ABN through Aetrix?
Please submit a Request for Quotation (RFQ) for ST662ABN 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 ST662ABN reliable?
The price and inventory of ST662ABN are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ST662ABN is usually 5 days.
3.What payment methods are accepted for ST662ABN?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ST662ABN transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ST662ABN?
ST662ABN orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ST662ABN 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 ST662ABN?
For technical support, including ST662ABN datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ST662ABN requirements.
6.How does Aetrix verify that ST662ABN is sourced from the original manufacturer or authorized distributors?
All ST662ABN 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 ST662ABN meets industry standards.
7.What is the process for return or replacement of ST662ABN?
All ST662ABN units undergo pre-shipment inspection (PSI). If there is an issue with ST662ABN, 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 ST662ABN part is unused and in its original packaging.
Return procedure for ST662ABN:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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