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Diodes Incorporated PAM2301CAAB180
- Part No.:
- PAM2301CAAB180
- Manufacturer:
- Diodes Incorporated
- Package:
- SOT-23-5 Thin, TSOT-23-5
- Datasheet:
-
PAM2301CAAB180.pdf
- Description:
- IC REG BUCK 1.8V 800MA TSOT25
- Quantity:
- Payment:
- Shipping:
Inventory:3,691
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Product details
Overview
PAM2301CAAB180 from Diodes Incorporated is a current-mode, synchronous step-down DC-DC converter delivering up to 800mA output current with 1.5MHz fixed switching frequency, 0.6V reference voltage, and 96% peak efficiency. It operates from 2.5V–5.5V input and delivers a factory-set 1.8V output in TSOT25 package, targeting battery-powered portable electronics requiring low quiescent current (40µA typ) and light-load PSM mode.
For engineers reviewing the PAM2301CAAB180 datasheet, PAM2301CAAB180 pinout, PAM2301CAAB180 application, or PAM2301CAAB180 equivalent, key selection criteria include its 1.8V fixed output, 5-pin TSOT25 footprint, EN-controlled shutdown (<0.1µA), UVLO threshold (≈2.3V), and internal synchronous MOSFETs eliminating external rectifier diodes.
Technical Context
The PAM2301CAAB180 uses current-mode PWM control for stable regulation and fast transient response at heavy loads, while automatically transitioning to pulse-skipping modulation (PSM) under light load to maintain high efficiency and minimize quiescent current. Its internal 0.6V reference enables precise output setting via external resistor divider or fixed-voltage variants.
It integrates complementary P- and N-channel MOSFETs with RDS(ON) of 0.30Ω (P) and 0.35Ω (N), supports 100% duty-cycle operation near VIN ≈ VOUT, and includes cycle-by-cycle overcurrent protection (1.5A peak), thermal shutdown (+150°C), and soft-start to limit inrush current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 1.8V - eliminates external feedback resistors and reduces BOM count. |
| Max Output Current | 800mA - sufficient for powering core logic, RF modules, or sensor subsystems in compact portable devices. |
| Switching Frequency | 1.5MHz (typ) - enables use of small 4.7µH inductors and 10µF ceramic capacitors, minimizing solution size. |
| Quiescent Current | 40µA (typ) - extends battery runtime in standby or low-activity modes without compromising startup speed. |
| Input Voltage Range | 2.5V to 5.5V - compatible with single Li+/Li-Po cells, USB ports, and multi-cell alkaline/NiMH sources. |
| Efficiency | Up to 96% - reduces thermal load and improves power density in space-constrained PCB layouts. |
| Shutdown Current | <0.1µA - ensures negligible battery drain during system sleep or off-state. |
Pinout & Package
Package: TSOT25 - 5-pin, ultra-thin surface-mount package (2.9mm × 2.8mm × 0.9mm) optimized for high-density portable designs with exposed thermal pad for enhanced heat dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - EN | Enable control input | Logic-high (>1.5V) enables regulation; logic-low (<0.3V) disconnects input from output and draws <0.1µA. |
| 2 - GND | Power and signal ground reference | Common return path for internal MOSFETs, error amplifier, and feedback circuitry; must be low-impedance. |
| 3 - SW | Switch node | Drain connection of internal P- and N-MOSFETs; carries high-frequency square-wave voltage and requires tight layout to minimize EMI. |
| 4 - VIN | Main power input | Accepts 2.5–5.5V supply; requires local 10µF ceramic capacitor placed adjacent to pin for high-frequency decoupling. |
| 5 - VOUT/FB | Output voltage sense / feedback | Internally connected to 0.6V reference comparator; for fixed-output version, this pin is internally tied to regulated 1.8V output. |
Key Features
| Feature | Design Value |
|---|---|
| Synchronous rectification | Integrated P- and N-MOSFETs eliminate external Schottky diode, reducing conduction loss and improving efficiency across load range. |
| Pulse-skipping modulation (PSM) | Automatically engages below ~10mA load to reduce switching losses and maintain <40µA quiescent current without audible noise. |
| Internal soft-start | Digital ramp limits inrush current during startup, preventing input voltage sag and output overshoot in battery-fed systems. |
| Thermal shutdown with hysteresis | Shuts down at +150°C junction temperature and re-enables only after cooling to +120°C, preventing thermal cycling damage. |
| Under-voltage lockout (UVLO) | Disables operation when VIN falls below ~2.3V, protecting batteries from deep discharge and ensuring clean power-up sequencing. |
Applications
| Wireless Headset Power Rail | Digital Camera Core Logic Supply |
|---|---|
|
Use Scenario: Powers Bluetooth audio SoC and MEMS microphone in compact wireless earbuds operating from single Li-ion cell (3.0–4.2V). IC Role / Device Role / Timing Role: Primary 1.8V LDO-replacement buck regulator providing stable, low-noise core voltage with dynamic load handling. Use Value: Delivers 96% efficiency at 300mA and 40µA quiescent current in standby, extending playback time by >18% versus legacy linear regulators. |
Use Scenario: Supplies image signal processor (ISP) and CMOS sensor interface in consumer digital cameras powered by dual AA alkaline cells (2.4–3.2V). IC Role / Device Role / Timing Role: Fixed-output step-down converter enabling direct battery-to-core-voltage conversion without external feedback network. Use Value: Eliminates two external resistors and associated layout area while maintaining ±3% output accuracy across temperature and line/load variations. |
| Portable Medical Glucometer | Smart Wearable Display Backlight Driver |
|
Use Scenario: Provides regulated 1.8V supply to microcontroller and electrochemical sensor interface in handheld blood glucose meters. IC Role / Device Role / Timing Role: Battery-efficient DC-DC converter supporting intermittent measurement cycles with rapid wake-up and stable settling. Use Value: Achieves sub-100µs output stabilization after EN assertion and maintains <10mV ripple under 500mA pulsed load, ensuring ADC accuracy. |
Use Scenario: Powers OLED display driver IC in fitness tracker with variable brightness, drawing 200–700mA depending on backlight intensity. IC Role / Device Role / Timing Role: High-efficiency, low-profile power stage delivering consistent 1.8V rail despite wide input voltage swing (2.8–4.8V). Use Value: Enables full-brightness operation for >4 hours on 120mAh coin cell due to 1.5MHz switching and minimal PCB footprint (TSOT25). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-down DC-DC converter applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS62231DRYR | 1.8V fixed output, 300mA max, 3.6MHz switching, 22µA IQ, 6-pin WSON | Lower current rating and higher frequency; requires smaller inductor but unsuitable for >300mA loads | Select if board space is critical and load stays ≤300mA; avoid for sustained 800mA operation. |
| RT8059GJ6 | 1.8V fixed output, 600mA max, 1.5MHz, 35µA IQ, 6-pin DFN2020 | Lower max current and different package; lacks PSM mode, resulting in higher light-load IQ (~120µA) | Choose only if TSOT25 footprint is unavailable; verify thermal margin at 600mA continuous load. |
Compared with TPS62231DRYR and RT8059GJ6, the PAM2301CAAB180 uniquely combines 800mA capability, 40µA quiescent current, PSM mode, and TSOT25 packaging-making it optimal for space-constrained, battery-sensitive applications demanding full-load performance without thermal derating.
Availability
PAM2301CAAB180 is available at Aetrix Electronics and suitable for wireless headsets, portable medical instruments, smart wearables, and digital camera subsystems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for PAM2301CAAB180 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
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-efficiency power management, signal integrity, and protection solutions for consumer, industrial, and automotive markets.
The PAM2301 belongs to Diodes' high-density DC-DC converter product line, designed specifically for portable battery-powered devices needing minimal external components, ultra-low quiescent current, and robust thermal performance in sub-3mm packages.
FAQ
What is the recommended input capacitor for PAM2301CAAB180?
A 10µF X5R/X7R ceramic capacitor placed within 2mm of the VIN and GND pins is required. Its low ESR (<10mΩ) and RMS current rating ≥400mA ensure stable operation and suppress high-frequency switching noise. Larger values improve hold-up time but do not enhance regulation.
Does PAM2301CAAB180 require an external feedback resistor network?
No. The "180" suffix indicates factory-trimmed 1.8V fixed output; the internal feedback divider is permanently configured, so no external R1/R2 resistors are needed. This reduces BOM count, layout area, and potential tolerance drift from external components.
How does the PAM2301CAAB180 behave during input undervoltage?
When VIN drops below the UVLO threshold (~2.3V), the device disables switching, disconnects VIN from VOUT, and draws <0.1µA. Output voltage decays passively through load; regulation resumes only after VIN rises above the UVLO release level (~2.5V) with hysteresis.
Can PAM2301CAAB180 drive a 1.8V FPGA I/O bank directly?
Yes - it delivers up to 800mA with ±3% output accuracy and <10mV ripple under full load. However, ensure proper input/output capacitance (10µF each), short low-impedance GND paths, and separation between SW and sensitive FPGA traces to prevent coupling-induced timing jitter.
PAM2301CAAB180 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- SOT-23-5 Thin, TSOT-23-5
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2.5V
- Voltage - Input (Max):
- 5.5V
- Voltage - Output (Min/Fixed):
- 1.8V
- Voltage - Output (Max):
- -
- Current - Output:
- 800mA
- Frequency - Switching:
- 1.5MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- TSOT-25
PAM2301CAAB180 FAQ
1.How can I place an order for PAM2301CAAB180 through Aetrix?
Please submit a Request for Quotation (RFQ) for PAM2301CAAB180 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 PAM2301CAAB180 reliable?
The price and inventory of PAM2301CAAB180 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for PAM2301CAAB180 is usually 5 days.
3.What payment methods are accepted for PAM2301CAAB180?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for PAM2301CAAB180 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for PAM2301CAAB180?
PAM2301CAAB180 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your PAM2301CAAB180 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 PAM2301CAAB180?
For technical support, including PAM2301CAAB180 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your PAM2301CAAB180 requirements.
6.How does Aetrix verify that PAM2301CAAB180 is sourced from the original manufacturer or authorized distributors?
All PAM2301CAAB180 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 PAM2301CAAB180 meets industry standards.
7.What is the process for return or replacement of PAM2301CAAB180?
All PAM2301CAAB180 units undergo pre-shipment inspection (PSI). If there is an issue with PAM2301CAAB180, 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 PAM2301CAAB180 part is unused and in its original packaging.
Return procedure for PAM2301CAAB180:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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