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Analog Devices Inc. ADP1148AR-5
- Part No.:
- ADP1148AR-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1148AR-5.pdf
- Description:
- IC REG BUCK 5V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:6,643
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Product details
Overview
ADP1148AR-5 from Analog Devices is a synchronous step-down switching regulator controller designed to drive external complementary P- and N-channel MOSFETs in high-efficiency DC/DC conversion. It delivers regulated 5 V output at up to 2 A, operates from 3.5 V to 18 V input, features constant off-time current-mode control (tOFF = 4–6 µs), and achieves >95% efficiency with adaptive sleep mode reducing quiescent current to 160 µA at VIN = 6–18 V. It is used in battery-powered telecom and avionics power supplies where low-noise, wide-input, and load-adaptive efficiency are critical.
For engineers reviewing the ADP1148AR-5 datasheet, ADP1148AR-5 pinout, ADP1148AR-5 application, or ADP1148AR-5 equivalent, this page provides verified technical context on its constant off-time architecture, 5 V fixed-output regulation, SO-14 package mapping, shutdown threshold (0.55–2.0 V), and real-world design meaning of parameters including RSENSE-dependent current limit, CT-timed frequency scaling, and sleep-mode ripple (50 mV p-p).
Technical Context
The ADP1148AR-5 implements a constant off-time (COT) current-mode control architecture where tOFF is set by an external CT capacitor and scales inversely with VOUT, enabling stable operation across wide VIN/VOUT ratios. Its internal voltage divider connects Sense(–) (Pin 7) directly to the 5 V output, eliminating external feedback resistors and ensuring precise 4.9–5.2 V regulation at 700 mA load.
Adaptive nonoverlap gate drives prevent shoot-through between external P- and N-MOSFETs, while sleep mode activates automatically below ~500 mA load-reducing ground current from 1.6 mA to 160 µA and maintaining >85% efficiency down to 10 mA. Shutdown is logic-controlled (Pin 10), with threshold 0.55–2.0 V and input current ≤5 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5 V (4.9–5.2 V at 700 mA); eliminates need for external feedback divider. |
| Input Voltage Range | 3.5 V to 18 V; supports 12 V telecom rails and wide-range industrial inputs. |
| Efficiency | >95% typical at 1 A; maintained over 5 mA–2 A via sleep/continuous mode transition. |
| Quiescent Current | 160–280 µA in sleep mode (VIN = 6–18 V); enables multi-day battery life in standby. |
| Off-Time | 4–6 µs (CT = 390 pF, ILOAD = 700 mA); sets minimum switching frequency and ripple current stability. |
| Shutdown Threshold | 0.55–2.0 V on Pin 10; compatible with standard CMOS/LVTTL logic interfaces. |
| Sense Threshold Range | 115–175 mV (V7 = VOUT ± 100 mV); defines peak inductor current limit via RSENSE. |
Pinout & Package
ADP1148AR-5 is housed in a 14-lead Small Outline (SO-14) package with 1.27 mm pitch, JEDEC MS-012AC compliant, thermal resistance θJA = 110°C/W. Pins 2 and 13 are NC; all other pins match functional definitions in Analog Devices Rev. A datasheet.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | P-Channel Drive | High-current gate driver (VIN to GND swing) for top P-MOSFET; requires low-inductance layout. |
| 3 | VIN | Main input supply (3.5–18 V); must be decoupled with ≥100 µF + 1 µF ceramic. |
| 4 | CT | Timing capacitor connection; sets operating frequency (e.g., 390 pF → ~250 kHz at VIN = 12 V). |
| 5 | Int VCC | Internally regulated 3.3 V supply; requires dedicated 1 µF ceramic bypass to Signal GND. |
| 6 | ITH | Error amplifier compensation node; connects RC network for loop stability per Figure 1. |
| 7 | SENSE(–) | Fixed 5 V output sensing point; internal divider sets feedback reference-no external resistors needed. |
| 8 | SENSE(+) | Current comparator (+) input; differential voltage vs. Pin 7 sets MOSFET current limit. |
| 10 | SHUTDOWN | Logic-level enable/disable; <0.55 V = active, >2.0 V = shutdown (10–24 µA leakage). |
| 11 | Signal GND | Small-signal reference; must be routed separately from Power GND to COUT(–). |
| 12 | Power GND | High-current return for N-MOSFET source and CIN(–); ties to PCB ground plane. |
| 14 | N-Channel Drive | High-current gate driver (GND to VIN swing) for bottom N-MOSFET; nonoverlap timing enforced. |
Key Features
| Feature | Design Value |
|---|---|
| Constant Off-Time Control | Enables stable operation across 3.5–18 V input without loop compensation redesign. |
| Automatic Sleep Mode | Reduces IQ to 160 µA below ~500 mA load, preserving >85% efficiency down to 10 mA. |
| Adaptive Nonoverlap Drive | Prevents simultaneous conduction of external P/N-MOSFETs, eliminating shoot-through risk. |
| Fixed 5 V Output Architecture | Internal Sense(–) divider removes external resistor network, improving accuracy and board space. |
| Short-Circuit Protection | Current-limit threshold (115–175 mV) tracks load via RSENSE, limiting peak IOUT to safe levels. |
Applications
| Telecom Power Supplies | Avionics Systems |
|---|---|
Use Scenario: Point-of-load regulation in 12 V distributed power architectures for base station radios and optical modules. IC Role / Device Role / Timing Role: Controller for synchronous buck stage delivering 5 V/2 A to FPGA I/O banks and SerDes transceivers. Use Value: >95% efficiency at full load and >85% at 10 mA extends thermal margin and reduces heatsink requirements in sealed enclosures. |
Use Scenario: Primary 5 V rail generation in flight control computers requiring MIL-STD-704 compliance and low EMI. IC Role / Device Role / Timing Role: Constant off-time controller driving radiation-hardened MOSFETs with adaptive sleep for intermittent sensor polling. Use Value: Sleep-mode IQ of 160 µA enables >100-hour battery backup during dormant phases without compromising transient response. |
| Notebook Computers | Industrial Power Distribution |
Use Scenario: Secondary 5 V supply for USB peripherals and display backlight controllers in ultra-thin clamshell designs. IC Role / Device Role / Timing Role: Fixed-output buck controller interfacing with system PMIC to manage dynamic load steps up to 2 A. Use Value: 4–6 µs off-time ensures fast load transient recovery (<10 µs) and minimal output droop during CPU burst activity. |
Use Scenario: DIN-rail mounted 5 V auxiliary supply for PLC I/O modules operating from 24 V DC field buses. IC Role / Device Role / Timing Role: High-reliability controller driving discrete MOSFETs with short-circuit foldback and thermal derating. Use Value: Shutdown threshold (0.55–2.0 V) allows direct interface with 24 V logic supervisors using simple resistor divider. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM5116PWPR | Wide-input (6–100 V), adjustable output, requires external feedback resistors; no integrated 5 V divider. | Used in higher-VIN industrial systems (>24 V); lacks fixed 5 V option and sleep-mode IQ optimization. | Select when input exceeds 18 V or adjustable output is required; not drop-in for ADP1148AR-5's fixed 5 V footprint. |
| TPS54202DRCT | Integrated FETs (2 A), 4.5–17 V input, adjustable output; no external MOSFET drive capability. | Targeted at space-constrained designs where discrete FETs are undesirable; lower peak efficiency (~92%) due to on-resistance losses. | Choose for simplified BOM and layout when 2 A integrated solution suffices; incompatible with ADP1148AR-5's external FET architecture. |
Compared with LM5116PWPR and TPS54202DRCT, ADP1148AR-5 uniquely combines fixed 5 V regulation, ultra-low sleep-mode IQ (160 µA), and discrete MOSFET drive in SO-14-making it optimal for battery-sensitive, wide-input, high-efficiency 5 V systems where external FET selection is preferred for thermal or reliability reasons.
Availability
ADP1148AR-5 is available at Aetrix Electronics and suitable for telecom power supplies, avionics systems, and industrial power distribution requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for ADP1148AR-5 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
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing semiconductors, serving precision instrumentation, communications, and industrial markets since 1965.
The ADP1148AR-5 belongs to Analog Devices' high-efficiency synchronous buck controller family, engineered specifically for battery-operated and wide-input DC/DC applications demanding adaptive efficiency, low quiescent power, and robust external FET control.
FAQ
What is the exact output voltage tolerance of the ADP1148AR-5 under load?
The ADP1148AR-5 delivers a regulated 5 V output with a tolerance of 4.9 V to 5.2 V at 700 mA load and VIN = 9 V, as specified in the Rev. A datasheet. This fixed output is achieved via an internal resistive divider connected to Pin 7 (SENSE(–)), eliminating external feedback components and ensuring consistent accuracy across temperature and line variations.
Does the ADP1148AR-5 require external feedback resistors to set its 5 V output?
No, the ADP1148AR-5 does not require external feedback resistors. Its 5 V output is set by an internal voltage divider connected to Pin 7 (SENSE(–)), which is tied directly to the output. This architecture simplifies design, improves accuracy, and reduces component count compared to adjustable versions like the ADP1148.
What is the shutdown pin behavior and threshold range for the ADP1148AR-5?
The ADP1148AR-5 shutdown pin (Pin 10) asserts shutdown when voltage exceeds 2.0 V, with a guaranteed threshold range of 0.55 V to 2.0 V at +25°C. Input current remains ≤5 µA across 0–8 V, enabling direct interface with standard logic outputs or simple resistor dividers from higher-voltage rails.
How does the ADP1148AR-5 achieve >95% efficiency, and at what load conditions?
The ADP1148AR-5 achieves >95% typical efficiency at 1 A load and VIN = 10 V through synchronous FET switching, adaptive nonoverlap drive, and ultralow gate drive losses. Efficiency remains >85% down to 10 mA thanks to automatic sleep mode, which reduces quiescent current from 1.6 mA to 160 µA-critical for battery longevity.
What package type and thermal characteristics apply to the ADP1148AR-5?
The ADP1148AR-5 is supplied in a 14-lead Small Outline (SO-14) package with θJA = 110°C/W, as confirmed in the Ordering Guide and Absolute Maximum Ratings. This thermal rating applies specifically to the AR suffix variant and must be used in junction temperature calculations: TJ = TA + (PD × 110°C/W).
ADP1148AR-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- ADP1148
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.5V
- Voltage - Input (Max):
- 18V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- -
- Frequency - Switching:
- -
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
ADP1148AR-5 FAQ
1.How can I place an order for ADP1148AR-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1148AR-5 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 ADP1148AR-5 reliable?
The price and inventory of ADP1148AR-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1148AR-5 is usually 5 days.
3.What payment methods are accepted for ADP1148AR-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1148AR-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1148AR-5?
ADP1148AR-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1148AR-5 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 ADP1148AR-5?
For technical support, including ADP1148AR-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1148AR-5 requirements.
6.How does Aetrix verify that ADP1148AR-5 is sourced from the original manufacturer or authorized distributors?
All ADP1148AR-5 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 ADP1148AR-5 meets industry standards.
7.What is the process for return or replacement of ADP1148AR-5?
All ADP1148AR-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1148AR-5, 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 ADP1148AR-5 part is unused and in its original packaging.
Return procedure for ADP1148AR-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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