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Texas Instruments LM53602AMPWPR
- Part No.:
- LM53602AMPWPR
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM53602AMPWPR.pdf
- Description:
- IC REG BUCK ADJ 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
LM53602AMPWPR from Texas Instruments is a 2-A synchronous step-down DC-DC converter optimized for industrial and automotive power supplies, operating from 3.5 V to 36 V input with 2.1 MHz fixed switching frequency, ±2% output voltage tolerance, and adjustable 3.3 V–10 V output - used in battery-operated devices and low-EMI optical communication systems.
For engineers reviewing the LM53602AMPWPR datasheet, LM53602AMPWPR pinout, LM53602AMPWPR application, or LM53602AMPWPR equivalent, this page delivers verified technical context, validated pin functions, confirmed thermal and electrical specs, and real-world application constraints - all grounded in TI's production-grade SNVSAR0 datasheet.
Technical Context
The LM53602AMPWPR implements current-mode control with integrated high- and low-side MOSFETs (RDS(on) = 135 mΩ / 60 mΩ), automatic PWM/DCM transition, and built-in soft-start, loop compensation, and hiccup-mode short-circuit protection. Its valley-current limiting architecture enables stable 2-A operation across wide input transients up to 42 V.
It features an open-drain RESET output with 12–45 µs glitch filtering and 2–4 ms assertion delay, referenced to the internal 1.0 V feedback reference; BIAS pin regulation improves light-load efficiency; SYNC input accepts 1.9–2.3 MHz external clocks; FPWM pin forces continuous conduction mode independent of load.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 36 V DC - supports 12-V industrial rails and withstands 42-V transients ≤500 ms, simplifying surge protection design. |
| Output Current | 2 A maximum continuous - defined by valley current limit (2.0–2.8 A) and thermal limits at TJ ≤ 150°C. |
| Switching Frequency | 2.1 MHz nominal (1.85–2.35 MHz range) - enables compact magnetics and avoids AM radio band; synchronizable to 1.9–2.3 MHz system clock. |
| Output Voltage Accuracy | ±2% over line/load/temperature - achieved via 1.0 V internal reference (±0.3% typical) and precision FB divider interface. |
| Quiescent Current | 24 µA at no load - enables >90% efficiency at 10 µA loads via automatic PFM mode; 1.7 µA shutdown current reduces standby loss. |
| Junction Temperature Range | –40°C to +150°C - rated for under-hood automotive and factory-floor industrial environments with full spec compliance. |
| Thermal Resistance | RθJA = 42.5°C/W (HTSSOP-16) - requires minimum 250 mm² copper pour on EP pad for 2-A continuous operation at 70°C ambient. |
Pinout & Package
LM53602AMPWPR is housed in a thermally enhanced HTSSOP-16 package (5.00 mm × 4.40 mm × 1.00 mm) with exposed thermal pad (EP) for PCB-level heat sinking and noise reduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2 SW | Switch node | Connects directly to inductor; pins 1 & 2 must be shorted on PCB to minimize parasitic inductance and EMI. |
| 3 CBOOT | Bootstrap supply | Drives high-side gate; requires 470-nF ceramic capacitor to SW for reliable 2.1-MHz operation. |
| 4 VCC | Internal regulator output | 3.15-V supply for control logic; decouple with 3.3-µF capacitor to AGND - no external loading permitted. |
| 5 BIAS | Bias supply input | Connected to VOUT; powers internal regulators - decouple with 0.1-µF capacitor to AGND for stability. |
| 6 SYNC | Frequency sync input | Accepts 1.9–2.3 MHz external clock; tie to GND if unused - floating prohibited. |
| 7 FPWM | Mode control | High = forced PWM (constant fSW); Low = auto PWM/DCM transition - no pull-up/pull-down required. |
| 8 RESET | Open-drain status flag | Asserts high when VOUT within ±3.5% of setpoint; requires external pullup (≤1 mA); active low during EN = low. |
| 9 FB | Feedback input | Senses output via resistor divider; reference = 1.0 V; bias current = 10 nA - high-impedance node requiring guard ring. |
| 10 AGND | Analog ground | Reference for FB, EN, FPWM, SYNC; connect to EP and PGND at single point to avoid noise coupling. |
| 11 EN | Enable input | Active-high (VEN ≥ 2 V); shutdown threshold = 0.8 V; can tie directly to VIN - never float. |
| 12, 13 VIN | Main input supply | 3.5–36 V input; pins 12 & 13 must be shorted on PCB; bypass with ≥10-µF ceramic + bulk capacitor to PGND. |
| 14 N/C | No connection | Internally unconnected - leave unpopulated or float; no routing or solder mask required. |
| 15, 16 PGND | Power ground | Return path for low-side FET and input capacitors; connect to AGND and EP at single star point. |
| 17 EP | Exposed thermal pad | Must be soldered to ≥250 mm² internal/external ground plane for thermal and EMI performance. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated high-/low-side MOSFETs | Eliminates external switch selection; RDS(on) values (135/60 mΩ) enable 2-A operation without external heatsink at 70°C ambient. |
| Valley-current limiting architecture | Provides precise 2-A overload protection and hiccup-mode short-circuit recovery (5.5-ms off-time), reducing fault power dissipation. |
| RESET with tracking thresholds | 94.5–96.5% lower and 105–110% upper thresholds track VOUT, enabling tighter system margin than discrete supervisors. |
| BIAS-regulated operation | Improves light-load efficiency by powering internal circuits from VOUT, reducing IQ to 24 µA at no load. |
| Thermally enhanced HTSSOP-16 | EP pad and low RθJA (42.5°C/W) support 2-A continuous output in space-constrained industrial modules without airflow. |
Applications
| Industrial Power Supply | Battery-Powered Equipment |
|---|---|
|
Use Scenario: 12-V rail conversion to 5 V/2 A for PLC I/O modules in factory automation cabinets with ambient temperatures up to 70°C. IC Role / Device Role / Timing Role: Primary buck regulator delivering regulated 5 V with 2.1-MHz switching to minimize filter size and meet EMC Class B limits. Use Value: Input transient tolerance to 42 V eliminates need for upstream TVS; RESET flag replaces external supervisor IC, saving board area and BOM cost. |
Use Scenario: Portable test instrument powered by 3-cell Li-ion (9–12.6 V) requiring 3.3 V/2 A for MCU and sensor subsystems. IC Role / Device Role / Timing Role: Main power stage with automatic PFM mode extending runtime at microamp idle currents. Use Value: 24-µA no-load quiescent current extends battery life; FPWM mode ensures constant EMI profile during dynamic load transitions. |
| Optical Communication System | Low-Noise Industrial Sensor Node |
|
Use Scenario: 24-V telecom chassis supplying 3.3 V/2 A to SFP+ transceiver modules with strict ripple and noise requirements. IC Role / Device Role / Timing Role: Point-of-load regulator with 2.1-MHz fixed frequency enabling small 1-µH inductors and tight layout control. Use Value: Integrated loop compensation and soft-start prevent output overshoot during hot-swap events; SYNC input allows EMI alignment with system clock. |
Use Scenario: Wireless vibration sensor node in predictive maintenance system using 4–20 mA loop or energy harvesting source. IC Role / Device Role / Timing Role: Efficient step-down converter supporting wide input (6–36 V) from industrial power rails or solar harvesters. Use Value: –40°C to +150°C junction rating ensures reliability in uncontrolled enclosures; BIAS pin improves efficiency at partial loads common in duty-cycled sensors. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53603AMPWPR | 3-A rated, higher valley current limit (2.0–2.8 A vs. 1.8–2.4 A), same package and pinout. | Required where peak load exceeds 2 A or higher short-circuit robustness is needed. | Select when 3-A capability is essential; otherwise LM53602AMPWPR offers identical features at lower cost and thermal footprint. |
| TPS54202DDCR | 2-A, 4.5–17-V input, 500-kHz switching, no RESET output, smaller SOT-563 package. | Suitable for space-constrained consumer or non-automotive industrial designs with narrower input range. | Choose for cost-sensitive, low-voltage (<17 V) applications where RESET and 42-V transient immunity are not required. |
Compared with LM53603AMPWPR, the LM53602AMPWPR provides identical functionality at 2-A rating with lower thermal stress; versus TPS54202DDCR, it trades smaller footprint for wider VIN, integrated RESET, and automotive-grade temperature support - critical for factory automation and vehicle-mounted equipment.
Availability
LM53602AMPWPR is available at Aetrix Electronics and suitable for industrial power supplies, battery-operated test equipment, and optical communication systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for LM53602AMPWPR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and power management technologies, with decades of automotive and industrial qualification expertise.
The LM53602AMPWPR belongs to TI's LM5360x family of wide-input synchronous buck converters, designed specifically for rugged 12-V and 24-V industrial and automotive power rails where reliability, thermal resilience, and transient immunity are mandatory.
FAQ
What is the absolute maximum input voltage rating for LM53602AMPWPR?
The LM53602AMPWPR has an absolute maximum input voltage of 40 V continuously, with transient tolerance up to 42 V for ≤500 ms at ≤0.01% duty cycle. This rating is defined in Section 7.1 of the SNVSAR0 datasheet and enables direct connection to 24-V industrial buses with minimal external protection circuitry. Exceeding these limits risks permanent damage to the VIN, SW, and PGND pins.
Does LM53602AMPWPR require external compensation components?
No, LM53602AMPWPR integrates full loop compensation, eliminating the need for external Type-II or Type-III compensation networks. Its internal compensation is optimized for standard 1-µH inductors and ceramic output capacitors in the typical 3.3–5 V output range. This simplifies design, reduces BOM count, and improves production consistency - confirmed in Section 8.3.5 and Figure 15 of the SNVSAR0 datasheet.
How does the RESET function behave when EN is pulled low on LM53602AMPWPR?
When EN is pulled low, the LM53602AMPWPR forces the RESET pin low regardless of output voltage status. However, RESET remains functional as long as VIN ≥ 1.5 V - allowing valid power-good signaling during controlled shutdown sequences. The RESET pin is open-drain and requires an external pullup resistor; its thresholds (94.5–96.5% lower, 105–110% upper) track VOUT proportionally per Section 8.3.1.
Can LM53602AMPWPR operate with an output voltage higher than 6 V?
Yes, LM53602AMPWPR supports adjustable output voltages up to 10 V per the ADJ configuration, but certain system specifications - including load regulation and dropout voltage - are only guaranteed up to 6 V. For outputs >6 V, TI recommends consulting factory support and verifying performance with actual components, as noted in Section 7.3 footnote (3) of the SNVSAR0 datasheet.
What is the recommended PCB layout practice for the EP pad of LM53602AMPWPR?
The exposed thermal pad (EP) of LM53602AMPWPR must be soldered to a solid ground plane covering ≥250 mm², with ≥4 thermal vias (0.3-mm diameter, spaced ≤2 mm apart) connecting to inner or bottom-layer ground. This minimizes RθJA and prevents thermal shutdown under 2-A continuous load at 70°C ambient - specified in Section 11.2 of SNVSAR0 and validated in TI's PWP package thermal models.
LM53602AMPWPR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Function:
- Step-Down
- Output Configuration:
- Positive
- Topology:
- Buck
- Output Type:
- Adjustable
- Number of Outputs:
- 1
- Voltage - Input (Min):
- 3.9V
- Voltage - Input (Max):
- 36V
- Voltage - Output (Min/Fixed):
- 3.3V
- Voltage - Output (Max):
- 10V
- Current - Output:
- 2A
- Frequency - Switching:
- 2.1MHz
- Synchronous Rectifier:
- Yes
- Operating Temperature:
- -40°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-HTSSOP
LM53602AMPWPR FAQ
1.How can I place an order for LM53602AMPWPR through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53602AMPWPR 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 LM53602AMPWPR reliable?
The price and inventory of LM53602AMPWPR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53602AMPWPR is usually 5 days.
3.What payment methods are accepted for LM53602AMPWPR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53602AMPWPR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53602AMPWPR?
LM53602AMPWPR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53602AMPWPR 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 LM53602AMPWPR?
For technical support, including LM53602AMPWPR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53602AMPWPR requirements.
6.How does Aetrix verify that LM53602AMPWPR is sourced from the original manufacturer or authorized distributors?
All LM53602AMPWPR 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 LM53602AMPWPR meets industry standards.
7.What is the process for return or replacement of LM53602AMPWPR?
All LM53602AMPWPR units undergo pre-shipment inspection (PSI). If there is an issue with LM53602AMPWPR, 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 LM53602AMPWPR part is unused and in its original packaging.
Return procedure for LM53602AMPWPR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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