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Analog Devices Inc. ADP1173AN-5
- Part No.:
- ADP1173AN-5
- Manufacturer:
- Analog Devices Inc.
- Package:
- 8-DIP (0.300", 7.62mm)
- Datasheet:
-
ADP1173AN-5.pdf
- Description:
- IC REG BUCK BOOST 5V 1.5A 8PDIP
- Quantity:
- Payment:
- Shipping:
Inventory:1,612
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Product details
Overview
ADP1173AN-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 mode (e.g., 3 V → 5 V) or buck mode (e.g., 12 V → 5 V), supporting portable instrumentation and flash memory VPP generation.
For engineers reviewing the ADP1173AN-5 datasheet, ADP1173AN-5 pinout, ADP1173AN-5 application, or ADP1173AN-5 equivalent, key selection criteria include its dual-mode topology support, user-adjustable current limit via ILIM pin, on-chip low-battery detector (via AO/SET), 8-pin PDIP package compatibility, and ±2.5% output voltage accuracy at 5 V under full load.
Technical Context
The ADP1173AN-5 implements a gated-oscillator control architecture with 24 kHz typical switching frequency, comparator-based regulation referenced to an internal 1.245 V bandgap, and hysteresis-stabilized feedback loop requiring no external compensation. Its dual-access power switch (SW1 collector, SW2 emitter) enables both step-up and step-down topologies without external transistor additions.
Regulation is achieved by comparing FB/SENSE voltage against the 1.245 V reference; oscillator activation occurs only when FB falls below threshold, minimizing quiescent current. The auxiliary gain block (SET/AO) functions as a configurable low-battery detector or error amplifier, with AO providing open-collector sinking capability up to 100 µA.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Voltage | Fixed 5.00 V ±2.5% (guaranteed over temperature and line/load) |
| Input Voltage Range | 2.0 V to 12.6 V in step-up mode; up to 30 V in step-down mode - supports wide battery and industrial supply inputs |
| Quiescent Current | 135 µA typical in boost mode at +25°C - enables multi-year operation in low-duty-cycle portable devices |
| Switch Current Limit | 400 mA (set by 220 Ω resistor from ILIM to VIN) - protects against overload while allowing design margin for transient peaks |
| Oscillator Frequency | 16–32 kHz (typical 24 kHz) - low-frequency switching reduces EMI and enables use of low-cost, high-inductance off-the-shelf inductors |
| Output Voltage Hysteresis | 20–55 mV - ensures stable regulation without external compensation components |
| Operating Temperature | 0°C to +70°C - qualified for commercial and industrial embedded environments |
Pinout & Package
ADP1173AN-5 is housed in an 8-lead plastic DIP (N-8) package with 0.3 inch body width and through-hole mounting. Pin spacing is 0.1 inch, compatible with standard PCB layouts and socketing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - ILIM | Current limit programming input | Connect to VIN directly for default 1.5 A max switch current; add 220 Ω resistor to VIN to reduce limit to 400 mA - enables safe operation with small inductors |
| 2 - VIN | Main power input | Accepts 2.0–30 V; supplies internal circuitry and powers switch - must be decoupled with ≥10 µF ceramic capacitor near pin |
| 3 - SW1 | Internal power switch collector | In step-up: connects to inductor/diode node; in step-down: connects to VIN - requires careful layout to minimize parasitic inductance |
| 4 - GND | Analog and power ground reference | Common return for all internal blocks; must be tied to low-impedance ground plane - separate analog/power ground routing not required |
| 5 - FB/SENSE | Feedback voltage sensing input | Internally connected to laser-trimmed resistor divider for fixed 5 V output - connect directly to regulated output for closed-loop control |
| 6 - SET | Auxiliary amplifier non-inverting input | Accepts resistor divider from VIN to detect low battery condition - used with AO pin to trigger system shutdown below user-defined threshold |
| 7 - AO | Auxiliary gain amplifier open-collector output | Sinks up to 100 µA; pulled low when SET voltage exceeds internal 1.245 V reference - drives LED or microcontroller interrupt pin |
| 8 - SW2 | Internal power switch emitter | In step-up: connects to GND; in step-down: connects to inductor - must not drop more than 0.5 V below ground (Schottky diode required) |
Key Features
| Feature | Design Value |
|---|---|
| Dual-mode topology support | Single IC replaces separate boost and buck controllers - reduces BOM count and simplifies design for multi-rail portable systems |
| On-chip 1 A power switch | Eliminates need for external MOSFET or bipolar transistor - saves board space and improves reliability in space-constrained applications |
| User-adjustable current limit | Resistor-programmable switch current (400 mA to 1.5 A) - allows precise thermal and efficiency optimization without changing IC |
| Low-battery detection circuit | Integrated SET/AO comparator pair with 1.245 V reference - enables autonomous system-level power management without external comparators |
| Minimal external component count | Requires only inductor, diode, output capacitor, and optional ILIM resistor - accelerates prototyping and lowers total solution cost |
Applications
| Portable Instrumentation | Flash Memory VPP Generation |
|---|---|
Use Scenario: Powering handheld multimeters, data loggers, or sensor nodes operating from two or three alkaline cells (3–4.5 V). IC Role / Device Role / Timing Role: Step-up regulator generating stable 5 V rail for microcontroller, ADC, and display backlight from declining battery voltage. Use Value: 110 µA standby current extends battery life beyond 5 years in sleep mode; fixed 5 V output eliminates trimming resistors and calibration overhead. |
Use Scenario: Providing +12 V programming voltage for NOR/NAND flash memory in embedded systems during firmware update. IC Role / Device Role / Timing Role: Step-up converter delivering 12 V at 10–20 mA from existing 3.3 V or 5 V system rail. Use Value: Internal 1 A switch handles brief high-current pulses without external FET; 24 kHz switching avoids audible noise in sensitive measurement environments. |
| Cellular Telephone Peripherals | LCD Bias Supply |
Use Scenario: Generating 5 V for USB OTG peripherals or camera modules in feature phones powered by single Li-ion cell (3.0–4.2 V). IC Role / Device Role / Timing Role: Boost converter supplying regulated 5 V bus with fast transient response to burst-mode peripheral activity. Use Value: 135 µA typical quiescent current minimizes standby drain; ILIM pin allows current limiting to match peripheral peak demand and prevent brownout. |
Use Scenario: Producing adjustable positive bias voltage (e.g., +10 V) for segment LCDs in medical or industrial displays. IC Role / Device Role / Timing Role: Step-up regulator driving high-impedance LCD segments with low ripple and minimal EMI interference. Use Value: Fixed-frequency 24 kHz operation enables predictable filter design; low ESR capacitor compatibility ensures <50 mV ripple even at 100 mA load. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar switching regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| ADP1173AR-5 | Same electrical specs; SO-8 surface-mount package instead of PDIP | Better suited for automated assembly and space-constrained PCBs; requires reflow-compatible layout | Select ADP1173AR-5 for volume production with SMT lines; ADP1173AN-5 preferred for prototyping, sockets, or through-hole legacy designs |
| MAX630CPA+ | 5 V fixed-output, 2–16.5 V input, 120 µA IQ, but only step-up capable (no buck mode) | Limited to boost-only applications; lacks ILIM programmability and AO-based low-battery detection | Choose MAX630CPA+ only if topology is strictly boost and footprint compatibility with PDIP-8 is required - no functional replacement for dual-mode use cases |
Compared with ADP1173AN-5, ADP1173AR-5 offers identical regulation performance in a smaller footprint but requires SMT process control, while MAX630CPA+ sacrifices step-down capability and current limit flexibility to achieve slightly lower quiescent current - making ADP1173AN-5 the sole option for mixed-voltage portable systems needing both boost and buck operation in through-hole format.
Availability
ADP1173AN-5 is available at Aetrix Electronics and suitable for portable instrumentation, flash memory programming, and cellular peripheral power conversion requiring stable component supply across extended product lifecycles.
Supply support for ADP1173AN-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, industrial automation, and communications markets since 1965.
The ADP1173 family was designed specifically for ultra-low-power, dual-mode DC-DC conversion in battery-operated portable equipment - emphasizing micropower operation, topology flexibility, and minimal external component count.
FAQ
What is the guaranteed output voltage tolerance for ADP1173AN-5 across temperature and load?
The ADP1173AN-5 delivers 5.00 V with a guaranteed tolerance of ±2.5% over the full operating temperature range (0°C to +70°C) and under all specified load conditions. This specification is ensured by on-die laser-trimmed resistors that set the feedback ratio, eliminating the need for external trimming components and maintaining accuracy without recalibration.
Can ADP1173AN-5 operate in step-down mode with a 24 V input?
Yes, ADP1173AN-5 supports step-down operation up to 30 V input, including 24 V. In this configuration, SW1 connects to VIN and SW2 drives the inductor. To maintain safe switch current, use the ILIM pin with an appropriate resistor (e.g., 180 Ω for ~600 mA limit per Figure 5), and select a Schottky diode rated for ≥30 V reverse voltage to protect the SW2 pin from exceeding –0.5 V.
How does the AO pin function in ADP1173AN-5, and what load can it drive?
The AO pin is an open-collector NPN output of the auxiliary gain block, sinking up to 100 µA when activated. It goes low when the voltage at the SET pin exceeds the internal 1.245 V reference - enabling low-battery detection. It can directly drive LEDs, optocouplers, or microcontroller GPIO pins configured as active-low interrupts, with no external pull-up required beyond the target logic's input structure.
What is the maximum achievable output current from ADP1173AN-5 in step-up mode with a 3 V input?
With a 3 V input, ADP1173AN-5 delivers up to 80 mA at 5 V in step-up configuration, as specified in the General Description. This assumes proper inductor selection (e.g., 100 µH, 1 A saturation), low-ESR output capacitor (≥470 µF), and Schottky diode (e.g., 1N5818). Output current decreases as input voltage drops toward 2.0 V due to reduced duty cycle headroom and switch conduction losses.
Is ADP1173AN-5 pin-compatible with other members of the ADP1173 family?
Yes, ADP1173AN-5 shares identical pinout and package (8-lead PDIP) with ADP1173AN, ADP1173AN-3.3, and ADP1173AN-12. All variants use the same FB/SENSE internal resistor network - only the output voltage differs. This allows direct substitution in existing layouts when changing output voltage requirements, provided external feedback components are removed (fixed versions require no external resistors).
ADP1173AN-5 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc.
- Series:
- -
- Package/Case:
- 8-DIP (0.300", 7.62mm)
- 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:
- Through Hole
- Supplier Device Package:
- 8-PDIP
ADP1173AN-5 FAQ
1.How can I place an order for ADP1173AN-5 through Aetrix?
Please submit a Request for Quotation (RFQ) for ADP1173AN-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 ADP1173AN-5 reliable?
The price and inventory of ADP1173AN-5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ADP1173AN-5 is usually 5 days.
3.What payment methods are accepted for ADP1173AN-5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ADP1173AN-5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ADP1173AN-5?
ADP1173AN-5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ADP1173AN-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 ADP1173AN-5?
For technical support, including ADP1173AN-5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ADP1173AN-5 requirements.
6.How does Aetrix verify that ADP1173AN-5 is sourced from the original manufacturer or authorized distributors?
All ADP1173AN-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 ADP1173AN-5 meets industry standards.
7.What is the process for return or replacement of ADP1173AN-5?
All ADP1173AN-5 units undergo pre-shipment inspection (PSI). If there is an issue with ADP1173AN-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 ADP1173AN-5 part is unused and in its original packaging.
Return procedure for ADP1173AN-5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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