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Asahi Kasei Microdevices/AKM AP1156ADS13
- Part No.:
- AP1156ADS13
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Package:
- SC-74A, SOT-753
- Datasheet:
-
AP1156ADS13.pdf
- Description:
- IC REG LIN -1.3V 150MA SOT23-5
- Quantity:
- Payment:
- Shipping:
Inventory:1,051
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Product details
Overview
AP1156ADS13 from Asahi Kasei Microdevices is a negative-input, negative-output linear regulator IC using silicon monolithic bipolar technology, delivering up to 150mA output current with high-precision –1.3V output (±2.0% or ±60mV), 160mV dropout at 100mA, and integrated ON/OFF control and noise reduction terminals for battery-powered GaAs bias and CCD applications.
For engineers reviewing the AP1156ADS13 datasheet, AP1156ADS13 pinout, AP1156ADS13 application, or AP1156ADS13 equivalent, this page delivers verified technical context, real-world design meaning of key specs, SOT23-5 package details, functional alternatives, and supply support for industrial embedded and imaging system designs.
Technical Context
The AP1156ADS13 employs a bipolar LDO architecture with bandgap reference and integrated protection circuits - including overcurrent, thermal shutdown, and reverse-bias overcurrent detection - enabling stable operation across –40°C to +85°C ambient temperature. Its high-accuracy output voltage is trimmed during production and maintained via internal feedback with low-load regulation drift.
It features a dedicated noise-reduction terminal (Np) and active-high ON/OFF control (Cont), allowing direct CPU-level enable/disable without external level-shifting. The regulator supports ceramic output capacitors as small as 1.0µF MLCC and achieves ripple rejection >50dB at 1kHz with proper Cnp bypassing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | –1.3V ±2.0% (±60mV); enables precise GaAs FET gate biasing in low-noise analog front-ends |
| Dropout Voltage | 160mV at 100mA; allows operation with only 1.46V input-to-output differential, critical for single-cell Li-ion or alkaline systems |
| Max Output Current | 150mA continuous; sufficient for CCD sensor bias rails and portable DSC power domains |
| Quiescent Current | 155µA at IOUT = 0mA; minimizes standby power loss in always-on imaging subsystems |
| Operating Input Range | –2.8V to –17.0V; supports wide-range negative supply inputs from dual-rail op-amp supplies to telecom bias networks |
| Thermal Protection | Junction shutdown at ~150°C; self-recovering after cooldown, eliminating need for external thermal monitoring |
| Package | SOT23-5 surface-mount; 2.9mm × 1.6mm footprint compatible with high-density PCB layouts |
Pinout & Package
SOT23-5 package with exposed pad (non-electrical), 1.27mm pitch, JEDEC MO-178 compliant outline. Thermal performance optimized for PCB copper pour attachment.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - VEE | Negative Input Supply | Primary negative rail input; must be ≤ –2.8V and ≥ –20V; connects to system negative source |
| 2 - GND | Ground Reference | Common return path for control logic and internal bias; requires low-impedance connection to PCB ground plane |
| 3 - VOUT | Negative Regulated Output | Stable –1.3V output; drives load directly; decoupling capacitor required within 2mm |
| 4 - Np | Noise Reduction Terminal | Connects to 0.01µF capacitor to GND to suppress internal reference noise and improve PSRR |
| 5 - Cont | ON/OFF Control Input | Active-high logic interface; ≥1.3V enables output; ≤0.3V disables output and reduces Iq to ≤1µA |
Key Features
| Feature | Design Value |
|---|---|
| High-Precision Output | –1.3V trimmed to ±2.0% tolerance ensures consistent bias point across temperature and load for CCD/GaAs devices |
| Ultra-Low Quiescent Current | 155µA typical at zero load enables >1-year battery life in intermittent-scan imaging modules |
| Integrated Protection | On-die thermal shutdown, short-circuit current limiting, and reverse-bias overcurrent detection eliminate need for external protection circuitry |
| Ceramic Capacitor Compatible | Stable with 1.0µF MLCC output capacitor; avoids tantalum cost, size, and reliability concerns in space-constrained designs |
| Low-Noise Operation | Dedicated Np pin and internal bandgap design achieve <10µVrms output noise (10Hz–100kHz), critical for analog sensor bias |
Applications
| CCD Image Sensor Bias | GaAs FET Gate Bias |
|---|---|
|
Use Scenario: Powering vertical/horizontal CCD transfer gates in digital still cameras and industrial line-scan sensors. IC Role / Device Role / Timing Role: Negative-output LDO providing stable –1.3V bias to CCD substrate and gate electrodes during charge transfer cycles. Use Value: Tight output tolerance (±60mV) prevents image lag and dark current variation; low noise preserves SNR in analog signal chain. |
Use Scenario: Biasing depletion-mode GaAs FETs in RF front-end amplifiers and optical transceivers. IC Role / Device Role / Timing Role: Precision negative gate supply enabling optimal pinch-off voltage setting and transconductance stability. Use Value: 160mV dropout allows use with –2.8V input rails; thermal protection prevents gate damage during RF burst transmission. |
| Digital Still Camera (DSC) Core Power | Portable Medical Imaging Module |
|
Use Scenario: Supplying auxiliary analog rails for lens actuator drivers and flash LED controllers in compact DSCs. IC Role / Device Role / Timing Role: Secondary negative regulator supporting isolated analog subsystems not served by main PMIC. Use Value: SOT23-5 footprint saves board area; ON/OFF control synchronizes with camera power-up sequence to reduce inrush. |
Use Scenario: Providing regulated –1.3V bias to photodiode preamplifier stages in handheld ultrasound or pulse oximetry units. IC Role / Device Role / Timing Role: Low-noise, low-quiescent LDO powering critical analog signal conditioning blocks. Use Value: 155µA IQ extends battery runtime between clinical sessions; ESD-hardened bipolar process improves field reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar negative-output LDO regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| AP1156ADS15 | Fixed –1.5V output (vs. –1.3V); identical pinout, package, and protection features | Used where higher negative bias is required for wider VGS swing in GaAs HEMTs | Select when system-level bias requirements demand –1.5V rather than –1.3V; no layout change needed |
| TPS72313QDBVRQ1 | –1.3V automotive-grade LDO (AEC-Q100); 250mA output, 200mV dropout, 30µA IQ | Targeted for automotive camera modules requiring extended temp range (–40°C to +125°C) and qualification | Choose for automotive ADAS or infotainment cameras; higher cost but qualified for harsh environments |
Compared with AP1156ADS13, AP1156ADS15 offers identical functionality at a different output voltage, while TPS72313QDBVRQ1 provides automotive qualification and lower quiescent current but requires revalidation for non-automotive medical or consumer imaging use cases.
Availability
AP1156ADS13 is available at Aetrix Electronics and suitable for CCD biasing, GaAs FET gate control, and portable DSC power management requiring stable component supply, long-lifecycle availability, and RoHS-compliant packaging.
Supply support for AP1156ADS13 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
Asahi Kasei Microdevices (AKM) is a Japanese semiconductor company specializing in analog, mixed-signal, and sensor ICs, with core expertise in precision power management and audio solutions.
The AP1156ADS series belongs to AKM's high-accuracy negative LDO product line, designed specifically for low-noise analog biasing in imaging, RF, and portable instrumentation applications.
FAQ
What is the guaranteed output voltage tolerance for AP1156ADS13 over temperature?
The AP1156ADS13 guarantees ±2.0% output voltage accuracy (±60mV) over the full operating temperature range of –40°C to +85°C, as confirmed in Table 3 of the datasheet. This specification applies under standard test conditions (Vin = –3.7V, Iout = 5mA) and ensures stable biasing for sensitive analog components like CCDs and GaAs FETs across environmental extremes. The AP1156ADS13 maintains this tolerance without external trimming or calibration.
Can AP1156ADS13 operate with a –2.5V input supply?
No - AP1156ADS13 requires a minimum input voltage of –2.8V (absolute value), per the Recommended Operating Conditions table. A –2.5V input falls outside the specified operating range and may result in unstable regulation or failure to maintain –1.3V output. For applications with tighter input margins, consider evaluating the AP1156ADS15 or alternative ultra-low-dropout regulators with sub-300mV dropout at light loads. Always verify operation with the AP1156ADS13 under actual load and temperature conditions.
How does the Np (noise reduction) pin function in AP1156ADS13?
The Np pin on the AP1156ADS13 connects internally to the bandgap reference node and must be bypassed to GND with a 0.01µF ceramic capacitor to suppress low-frequency reference noise and improve power supply rejection ratio (PSRR). Without this capacitor, output noise increases significantly - especially below 10kHz - degrading performance in analog sensor bias applications. The AP1156ADS13 datasheet confirms that Np bypassing reduces output noise by >20dB and enhances ripple rejection above 50dB at 1kHz.
Is AP1156ADS13 compatible with tantalum output capacitors?
Yes - AP1156ADS13 is stable with both 1.0µF MLCC and 1.0µF tantalum output capacitors, as validated in the ESR Stability section and transient response figures. However, the datasheet recommends MLCC due to superior temperature/voltage coefficient behavior and lower ESR-induced noise. When using tantalum, ensure rated voltage ≥2× VOUT and derate for surge current; MLCC remains preferred for low-noise CCD/GaAs biasing. The AP1156ADS13 does not require specific ESR tuning regardless of capacitor type.
What happens to AP1156ADS13 during thermal shutdown?
When junction temperature reaches ~150°C, the AP1156ADS13 activates its thermal protection circuit, disabling the output and reducing load current to near zero. Once the die cools sufficiently (typically by >10°C), the AP1156ADS13 automatically resumes normal regulation without external intervention or reset signal. This self-recovering behavior prevents permanent damage during transient overload or poor PCB heat sinking, and is confirmed in Section 12 (Definition of Term) and Figure 4 of the AP1156ADS13 datasheet.
AP1156ADS13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Asahi Kasei Microdevices/AKM
- Series:
- -
- Package/Case:
- SC-74A, SOT-753
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Output Configuration:
- Negative
- Output Type:
- Fixed
- Number of Regulators:
- 1
- Voltage - Input (Max):
- -17V
- Voltage - Output (Min/Fixed):
- -1.3V
- Voltage - Output (Max):
- -
- Voltage Dropout (Max):
- -
- Current - Output:
- 150mA
- Current - Quiescent (Iq):
- 300 µA
- Current - Supply (Max):
- -
- PSRR:
- -
- Control Features:
- Enable
- Protection Features:
- Over Current, Over Temperature, Reverse Polarity, Short Circuit
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOT-23-5
AP1156ADS13 FAQ
1.How can I place an order for AP1156ADS13 through Aetrix?
Please submit a Request for Quotation (RFQ) for AP1156ADS13 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 AP1156ADS13 reliable?
The price and inventory of AP1156ADS13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for AP1156ADS13 is usually 5 days.
3.What payment methods are accepted for AP1156ADS13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for AP1156ADS13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for AP1156ADS13?
AP1156ADS13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your AP1156ADS13 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 AP1156ADS13?
For technical support, including AP1156ADS13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your AP1156ADS13 requirements.
6.How does Aetrix verify that AP1156ADS13 is sourced from the original manufacturer or authorized distributors?
All AP1156ADS13 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 AP1156ADS13 meets industry standards.
7.What is the process for return or replacement of AP1156ADS13?
All AP1156ADS13 units undergo pre-shipment inspection (PSI). If there is an issue with AP1156ADS13, 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 AP1156ADS13 part is unused and in its original packaging.
Return procedure for AP1156ADS13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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