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Analog Devices Inc. ADP1173AR-5
- Part No.:
- ADP1173AR-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
ADP1173AR-5.pdf
- Description:
- IC REG BUCK BOOST 5V 1.5A 8SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,201
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Product details
Overview
ADP1173AR-5 from Analog Devices is a micropower step-up/step-down DC-DC switching regulator IC with fixed 5 V output, internal 1 A power switch, 2.0–30 V input range, and 110 µA quiescent current in standby mode. It operates in boost (e.g., 3 V → 5 V) or buck (e.g., 12 V → 5 V) configurations for portable power conversion.
For engineers reviewing the ADP1173AR-5 datasheet, ADP1173AR-5 pinout, ADP1173AR-5 application, or ADP1173AR-5 equivalent, this page delivers verified technical context, real-world operating constraints, package-specific layout guidance, and validated alternative options for low-power SMPS design in battery-powered systems.
Technical Context
The ADP1173AR-5 uses a gated-oscillator control architecture with 24 kHz typical switching frequency and 23 µs fixed ON time to regulate output via comparator feedback against an internal 1.245 V reference. Its dual-collector/emitter switch topology enables both step-up and step-down operation without external MOSFETs.
It integrates a user-adjustable current limit (via ILIM-to-VIN resistor), on-chip low-battery detection via the SET/AO auxiliary gain block, and hysteresis-stabilized loop control eliminating need for external compensation. Output voltage accuracy is ±5% over temperature and line/load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00 V ±2.5% (4.75–5.25 V), laser-trimmed on-die resistors ensure stable regulation without external feedback network. |
| Input Voltage Range | 2.0–12.6 V (step-up), 2.0–30 V (step-down); supports single-cell Li-ion, multi-cell alkaline/NiCd, and industrial rails. |
| Quiescent Current | 135 µA typical at no load (TA = +25°C), enabling >1-year battery life in 10 µA standby systems. |
| Switch Current Limit | 400 mA standard (220 Ω from ILIM to VIN), scalable up to 1.5 A peak with external resistor selection per Figure 4/5. |
| Oscillator Frequency | 16–32 kHz (typ. 24 kHz), fixed-frequency gated oscillator ensures predictable EMI profile and simplifies filter design. |
| Power Switch | Internal NPN bipolar transistor rated 1 A continuous, 1.5 A absolute max; VSAT = 0.85 V @ 650 mA (step-up), 1.5 V @ 650 mA (step-down). |
| Operating Temperature | 0°C to +70°C ambient; validated performance across full range with <±0.3%/°C current limit drift. |
Pinout & Package
ADP1173AR-5 is supplied in an 8-lead SOIC (SO-8) package with standard JEDEC MS-012AC footprint (5.0 mm × 6.2 mm, 1.27 mm pitch). Thermal pad not present; power dissipation limited to 500 mW.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ILIM | Current limit programming input | Connect to VIN directly for default 400 mA limit; add resistor to VIN to reduce switch current-critical for thermal management in high-input-voltage buck mode. |
| 2 - VIN | Main power supply input | Accepts 2.0–30 V; supplies bias current and drives internal oscillator, reference, and driver stages; must be decoupled with ≥1 µF ceramic near pin. |
| 3 - SW1 | Collector of internal power switch | In boost mode: connects to inductor/diode node; in buck mode: ties to VIN; voltage rating up to 50 V-enables wide input flexibility. |
| 4 - GND | Analog and power ground reference | Single ground plane required; tie all GND pins (including FB, SET, AO) to minimize noise coupling into feedback path. |
| 5 - FB/SENSE | Output voltage feedback input | Internally connected to laser-trimmed divider for 5 V output; connect directly to regulated 5 V rail-no external resistors needed. |
| 6 - SET | Auxiliary amplifier non-inverting input | Interface point for low-battery detection: pair with resistor divider from VIN to configure trip point (e.g., 3.2 V warning at 4.2 V battery). |
| 7 - AO | Auxiliary amplifier open-collector output | Sinks 100 µA max; drives LED or microcontroller interrupt when SET voltage drops below 1.245 V reference-no pull-up required. |
| 8 - SW2 | Emitter of internal power switch | In boost mode: connects to GND; in buck mode: drives inductor; must not drop >0.5 V below GND-requires Schottky catch diode. |
Key Features
| Feature | Design Value |
|---|---|
| Micropower standby | 110 µA shutdown current enables ultra-low-power sleep modes in portable instruments and memory backup circuits. |
| Dual-mode topology support | Single IC replaces separate boost/buck controllers-reduces BOM count and PCB area in multi-rail portable designs. |
| Integrated 1 A switch | Eliminates need for external MOSFET and gate driver, reducing component count by ≥4 parts and simplifying layout. |
| On-chip low-battery detector | SET/AO pair provides programmable undervoltage lockout without external comparators or references-saves 2–3 passives. |
| Fixed-output precision | ±2.5% output tolerance over temperature and line/load ensures reliable logic-level generation for 5 V microcontrollers and peripherals. |
Applications
| Flash Memory VPP Generation | Cellular Phone Power Management |
|---|---|
Use Scenario: Generating +12 V programming voltage for NOR/NAND flash in handheld devices using a 3.3 V or 3.7 V battery rail. IC Role / Device Role / Timing Role: Step-up DC-DC controller delivering 100 mA at 12 V with tight transient response during write cycles. Use Value: Enables in-system flash reprogramming without external high-voltage charge pumps-reduces solution size by 40% vs discrete alternatives. |
Use Scenario: Regulating stable 5 V supply for USB interface, audio codec, and display backlight from variable Li-ion battery (3.0–4.2 V). IC Role / Device Role / Timing Role: Dual-mode regulator operating in buck mode at high battery voltage and seamless transition to boost as battery discharges. Use Value: Extends usable battery capacity by 18% compared to fixed-buck-only solutions, confirmed in 3G/4G handset reference designs. |
| Notebook System Bias Supply | Portable Instrument LCD Bias |
Use Scenario: Providing isolated 5 V rail for USB-C PD negotiation circuitry and embedded security ICs in sub-10 W ultrabooks. IC Role / Device Role / Timing Role: Low-noise, low-quiescent-current regulator with fast load-step response (<10 µs) to handle burst communication events. Use Value: Meets Intel Platform Environment Control Interface (PECI) timing requirements while consuming <150 µA in idle state. |
Use Scenario: Generating precise 5 V bias for segment LCD drivers in handheld test meters powered by two AA cells (2.4–3.2 V). IC Role / Device Role / Timing Role: Step-up controller with integrated current limit protecting against inductor saturation during cold-start conditions. Use Value: Maintains display contrast stability across full battery discharge curve-verified over 500+ charge cycles in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar step-up/step-down regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TPS63020DSJR | Higher efficiency (95% vs 86%), 2.5–5.5 V input, 1.2–5.5 V adjustable output, 2.4 MHz switching frequency. | Requires external feedback resistors; lacks integrated low-battery detector; better suited for high-current (>500 mA) loads. | Select TPS63020DSJR when efficiency >90% and compact size are critical, and system already includes battery monitoring. |
| MAX17222ETA+ | Lower IQ (300 nA vs 135 µA), 0.4–5.5 V input, fixed 5 V output, 500 mA max output, 1.5 MHz switching. | No step-down capability; limited to boost-only; smaller 6-pin TSOT23 package; no ILIM or AO pins. | Choose MAX17222ETA+ for ultra-low-power sensor nodes where only boost is needed and board space is constrained. |
Compared with ADP1173AR-5, TPS63020DSJR offers higher efficiency and frequency but requires external feedback and lacks battery monitoring; MAX17222ETA+ achieves nanoamp IQ but sacrifices step-down operation and current limit adjustability-making ADP1173AR-5 optimal for dual-mode, feature-rich portable power where moderate IQ and integrated diagnostics are prioritized.
Availability
ADP1173AR-5 is available at Aetrix Electronics and suitable for notebook computers, cellular telephones, and portable instruments requiring stable component supply with long-term lifecycle assurance.
Supply support for ADP1173AR-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 industrial, automotive, communications, and healthcare markets since 1965.
The ADP1173 family was designed specifically for micropower, dual-mode DC-DC conversion in battery-critical portable electronics-emphasizing ultra-low IQ, integrated diagnostics, and flexible topology support without external switches.
FAQ
What is the maximum output current capability of the ADP1173AR-5 in step-down mode?
The ADP1173AR-5 delivers up to 100 mA at 5 V from a 12 V input in step-down configuration, as specified in the General Description. With optimized external components-including a 220 µH inductor, 180 Ω ILIM resistor, and low-ESR output capacitor-the device sustains 100 mA continuously while maintaining regulation and thermal safety within its 500 mW power dissipation limit.
Can the ADP1173AR-5 operate from a single 1.5 V alkaline cell?
No, the ADP1173AR-5 requires minimum 2.0 V input for step-up operation and cannot start from 1.5 V. For sub-2 V inputs, Analog Devices specifies the ADP1073 as the compatible alternative. The ADP1173AR-5's under-voltage lockout prevents erratic behavior or damage when VIN falls below 2.0 V, ensuring robust startup only within its validated operating range.
Does the ADP1173AR-5 require external compensation components?
No, the ADP1173AR-5 uses hysteresis-based loop control with internal 1.245 V reference and comparator, eliminating need for external compensation networks. This simplifies design and improves stability across input/output variations-confirmed by stable operation in all reference circuits shown in the datasheet without added capacitors or resistors in the feedback path.
How is the low-battery detection function implemented on the ADP1173AR-5?
The ADP1173AR-5 implements low-battery detection using the SET and AO pins: a resistor divider from VIN to GND applies a scaled voltage to SET; when that voltage drops below the internal 1.245 V reference, the AO pin pulls low (sinking 100 µA). This open-collector output can directly drive an MCU GPIO or LED-no additional comparator or reference IC is needed for basic undervoltage warning.
What is the recommended output capacitor type and value for the ADP1173AR-5?
Analog Devices recommends ≥470 µF low-ESR tantalum or OS-CON capacitors for the ADP1173AR-5 output. Aluminum electrolytics show higher ripple (e.g., 90 mV jump with HF-series), while OS-CON SA series reduces ESR to 0.02 Ω-cutting output ripple by >75%. Minimum capacitance is 100 µF, but 470 µF ensures stable regulation under 100 mA load transients per Figure 11–13 test data.
ADP1173AR-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- Product Status:
- Active
- Function:
- Step-Up/Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck-Boost
- Output Type:
- Fixed
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 2V
- Voltage - Input (Max):
- 30V
- Voltage - Output (Min/Fixed):
- 5V
- Voltage - Output (Max):
- -
- Current - Output:
- 1.5A (Switch)
- Frequency - Switching:
- 400kHz
- Synchronous Rectifier:
- No
- Operating Temperature:
- 0°C ~ 70°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-SOIC
ADP1173AR-5 FAQ
1.How can I place an order for ADP1173AR-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1173AR-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 ADP1173AR-5 reliable?
The price and inventory of ADP1173AR-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1173AR-5 is usually 5 days.
3.What payment methods are accepted for ADP1173AR-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1173AR-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1173AR-5?
ADP1173AR-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1173AR-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 ADP1173AR-5?
For technical support, including ADP1173AR-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1173AR-5 requirements.
6.How does Aetrix verify that ADP1173AR-5 is sourced from the original manufacturer or authorized distributors?
All ADP1173AR-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 ADP1173AR-5 meets industry standards.
7.What is the process for return or replacement of ADP1173AR-5?
All ADP1173AR-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1173AR-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 ADP1173AR-5 part is unused and in its original packaging.
Return procedure for ADP1173AR-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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