My Inquiry
My Account
Texas Instruments LM53602AMPWPT
- Part No.:
- LM53602AMPWPT
- Manufacturer:
- Texas Instruments
- Package:
- 16-PowerTSSOP (0.173", 4.40mm Width)
- Datasheet:
-
LM53602AMPWPT.pdf
- Description:
- IC REG BUCK ADJ 2A 16HTSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:975
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
LM53602AMPWPT 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 3.3–10 V output - deployed in battery-powered equipment and low-EMI optical communication systems.
For engineers reviewing the LM53602AMPWPT datasheet, LM53602AMPWPT pinout, LM53602AMPWPT application, or LM53602AMPWPT equivalent, this page delivers verified technical context, validated pin functions, real-world application constraints, and confirmed alternative options - all grounded in TI's production-grade SNVSAR0 datasheet (November 2016).
Technical Context
The LM53602AMPWPT implements current-mode control with automatic PWM/DCM transition, enabling high efficiency across load range while maintaining 2.1 MHz operation up to 20 V input; its valley-current limiting architecture protects against sustained overloads via hiccup-mode shutdown after 64 cycles.
It integrates internal loop compensation, soft-start, thermal shutdown, UVLO, and an open-drain RESET output with 2–4 ms assertion delay and 12–45 µs glitch filtering - eliminating need for external supervisory ICs in space-constrained designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Input Voltage Range | 3.5 V to 36 V DC; withstands 42 V transients ≤500 ms - simplifies surge protection in 12-V industrial bus environments. |
| Output Current | Up to 2 A continuous - defined by LM53602 variant's low-side valley current limit of 2.0–2.8 A and high-side peak limit of 2.4–4.4 A. |
| Switching Frequency | Fixed 2.1 MHz (±12.5% over VIN); synchronizable to 1.9–2.3 MHz external clock - enables compact magnetics and EMI filtering. |
| Output Voltage Accuracy | ±2% over –40°C to 150°C junction temperature - ensures stable regulation in factory automation and under-hood automotive applications. |
| Quiescent Current | 24 µA at no load (typical), 1.7 µA in shutdown - extends runtime in battery-operated devices without compromising startup speed. |
| RESET Function | Open-drain output with 94.5–96.5% falling threshold and 105–110% rising threshold relative to VOUT - provides accurate, filtered power-good signaling. |
| Junction Temperature Range | –40°C to +150°C - supports operation in harsh environments including motor drives and industrial PLCs. |
Pinout & Package
LM53602AMPWPT uses a thermally enhanced 16-pin HTSSOP 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 power inductor; pins 1 and 2 must be shorted on PCB to minimize parasitic inductance. |
| 3 CBOOT | Bootstrap supply | Drives high-side MOSFET gate; requires 470-nF ceramic capacitor to SW for reliable bootstrapping. |
| 4 VCC | Internal regulator output | 3.15-V supply for control circuitry; decoupled with 3.3-µF capacitor to AGND - not for external loads. |
| 5 BIAS | Bias supply input | Connected to output rail; powers internal regulators - decoupled with 0.1-µF capacitor to AGND. |
| 6 SYNC | Frequency sync input | Accepts 1.9–2.3 MHz external clock; must be grounded if unused - floating prohibited. |
| 7 FPWM | Mode control | High = forced PWM (constant frequency); Low = auto mode (PWM/DCM transition); no pull-up/pull-down required. |
| 8 RESET | Open-drain fault flag | Asserts low during undervoltage/fault; requires external pullup resistor - remains valid down to VIN = 1.5 V when EN = 0 V. |
| 9 FB | Feedback input | Senses output voltage via resistive divider; reference voltage = 1.000 V (±1%) - sets output as VOUT = 1.000 × (1 + R1/R2). |
| 10 AGND | Analog ground | Reference for feedback, error amplifier, and internal circuits; tied to EP and PGND at single-point star ground. |
| 11 EN | Enable input | Active-high logic; turns on at ≥2.0 V, shuts down fully at ≤0.8 V - can be directly connected to VIN. |
| 12, 13 VIN | Main input supply | 3.5–36 V input; pins 12 and 13 must be shorted on PCB and bypassed with high-quality capacitors to PGND. |
| 14 N/C | No connection | Internally unconnected - left floating or grounded per layout best practice. |
| 15, 16 PGND | Power ground | Return path for low-side MOSFET and input/output capacitors; tied to AGND and EP at thermal pad. |
| 17 EP | Exposed thermal pad | Must be soldered to large copper pour for thermal dissipation and EMI suppression - electrically connected to PGND. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated loop compensation | Eliminates external compensation network - reduces BOM count and design iteration time for standard buck configurations. |
| Valley-current overload protection | Triggers hiccup-mode shutdown after 64 consecutive current-limit cycles - limits thermal stress during sustained short-circuit faults. |
| Reset output with programmable delay | 2–4 ms assertion delay and 12–45 µs glitch filter - prevents false triggers during transient load steps or line disturbances. |
| Automatic light-load PFM mode | Reduces no-load input current to 24 µA while preserving fast transient response - ideal for always-on industrial sensors. |
| Thermally enhanced HTSSOP | θJA = 42.5°C/W on JEDEC 4-layer board - enables 2 A operation without heatsink in ambient ≤85°C with proper PCB copper area. |
Applications
| Industrial Power Supply | Battery-Powered Device |
|---|---|
Use Scenario: 12-V factory automation controller requiring clean 5-V rail for microcontroller and I/O peripherals. IC Role / Device Role / Timing Role: Primary 2-A buck regulator delivering regulated 5-V output from wide-input 12-V bus with transient immunity. Use Value: Input range up to 36 V and 42-V transient tolerance eliminates need for upstream TVS clamping in noisy plant-floor environments. |
Use Scenario: Portable handheld test instrument powered by Li-ion battery (3.0–4.2 V nominal). IC Role / Device Role / Timing Role: Step-down converter generating stable 3.3-V logic supply with ultra-low quiescent current. Use Value: 24-µA no-load current extends battery life in sleep mode; 3.5-V minimum input enables full discharge utilization down to 3.3-V cell voltage. |
| Low-EMI Optical Transceiver | Automotive Body Control Module |
Use Scenario: SFP+ module requiring low-noise 3.3-V supply for laser driver and serializer/deserializer ICs. IC Role / Device Role / Timing Role: Fixed-frequency 2.1-MHz buck regulator minimizing conducted EMI in RF-sensitive signal paths. Use Value: Constant 2.1-MHz operation (vs. variable-frequency PFM) avoids spectral spreading and eases EMI filter design. |
Use Scenario: Under-hood BCM supplying 5-V rail to CAN transceivers and sensor interfaces. IC Role / Device Role / Timing Role: Automotive-grade buck converter operating across –40°C to +150°C junction temperature. Use Value: 150°C max junction rating and integrated thermal shutdown ensure reliability in high-ambient engine compartment locations. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar synchronous buck regulator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| LM53603AMPWPT | 3-A rated version with higher valley current limit (2.0–2.8 A → 3.0–4.3 A) and peak limit (2.4–4.4 A → 4.5–6.2 A); identical pinout and feature set. | Supports higher output current demands in same footprint - suitable where future scalability or margin is required. | Select LM53603AMPWPT when >2 A load capability is needed; LM53602AMPWPT remains optimal for cost- and size-sensitive 2-A designs. |
| TPS54202DDCR | 2-A buck with 4.5–17-V input, 500-kHz switching, integrated FETs, but lacks RESET output, SYNC, and 36-V tolerance. | Targeted at lower-voltage consumer/industrial apps; cannot replace LM53602AMPWPT in 24-V/36-V or automotive transient-prone systems. | Choose TPS54202DDCR only for 12-V-only systems where RESET and wide VIN are unnecessary - not a drop-in replacement. |
Compared with LM53603AMPWPT, the LM53602AMPWPT offers precise 2-A capability with identical features and footprint at lower cost; versus TPS54202DDCR, it delivers critical 36-V operation, RESET signaling, and 2.1-MHz frequency - making it irreplaceable in high-reliability industrial and automotive power rails.
Availability
LM53602AMPWPT is available at Aetrix Electronics and suitable for industrial power supplies, battery-operated instrumentation, and low-EMI optical communication systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for LM53602AMPWPT 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 - serving industrial, automotive, and communications markets since 1930.
The LM53602AMPWPT belongs to TI's LM5360x family of wide-VIN synchronous buck regulators, engineered specifically for robust 12-V industrial and automotive power conversion with integrated protection, precision regulation, and thermal resilience.
FAQ
What is the maximum input voltage the LM53602AMPWPT can withstand without damage?
The LM53602AMPWPT has an absolute maximum input voltage rating of 40 V DC, and can sustain 42 V transients for ≤500 ms at ≤0.01% duty cycle. This transient tolerance is explicitly specified in Section 7.1 of the SNVSAR0 datasheet and enables direct use in 24-V and 36-V industrial bus systems with minimal external protection.
Does the LM53602AMPWPT require external compensation components?
No, the LM53602AMPWPT includes built-in loop compensation as stated in the Features section of the datasheet. This eliminates the need for external RC networks in standard buck configurations, reducing component count and simplifying layout - though external compensation may be added for specialized dynamic response tuning.
Can the LM53602AMPWPT operate with an input voltage below 3.5 V?
No - the LM53602AMPWPT requires a minimum input voltage of 3.5 V to initiate regulation, and its minimum operating voltage is specified as 3.95 V (rising) in Section 7.3. Operation below 3.5 V is outside recommended conditions and will prevent startup or cause dropout; the device shuts down completely when VIN falls below 2.9–3.55 V depending on hysteresis.
How does the RESET output of the LM53602AMPWPT behave during enable/disable transitions?
When EN is pulled low, the LM53602AMPWPT forces RESET low regardless of output voltage status. The RESET output remains functional down to VIN = 1.5 V during shutdown, providing valid fault indication even during brownout conditions - a behavior confirmed in Section 6 Pin Functions and Section 8.3.1 of the datasheet.
Is the LM53602AMPWPT pin-compatible with the LM53603AMPWPT?
Yes - the LM53602AMPWPT and LM53603AMPWPT share identical 16-pin HTSSOP (PWP) packaging, pinout, and electrical interface. They differ only in current capability (2 A vs. 3 A) and associated current-limit thresholds; all control signals, feedback, power, and thermal connections are functionally and physically interchangeable.
LM53602AMPWPT 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
LM53602AMPWPT FAQ
1.How can I place an order for LM53602AMPWPT through Aetrix?
Please submit a Request for Quotation (RFQ) for LM53602AMPWPT 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 LM53602AMPWPT reliable?
The price and inventory of LM53602AMPWPT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for LM53602AMPWPT is usually 5 days.
3.What payment methods are accepted for LM53602AMPWPT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for LM53602AMPWPT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for LM53602AMPWPT?
LM53602AMPWPT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your LM53602AMPWPT 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 LM53602AMPWPT?
For technical support, including LM53602AMPWPT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your LM53602AMPWPT requirements.
6.How does Aetrix verify that LM53602AMPWPT is sourced from the original manufacturer or authorized distributors?
All LM53602AMPWPT 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 LM53602AMPWPT meets industry standards.
7.What is the process for return or replacement of LM53602AMPWPT?
All LM53602AMPWPT units undergo pre-shipment inspection (PSI). If there is an issue with LM53602AMPWPT, 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 LM53602AMPWPT part is unused and in its original packaging.
Return procedure for LM53602AMPWPT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
LM53602AMPWPT Tags
-
TPS562201DDCR
Texas Instruments
-
MC34063ABD-TR
STMicroelectronics
-
TPS561201DDCR
Texas Instruments
-
MC33063ADR
Texas Instruments
-
MC34063ADR
Texas Instruments
-
TPS560200DBVR
Texas Instruments
-
AP3012KTR-G1
Diodes Incorporated
-
TLV61048DBVR
Texas Instruments
-
AZ34063UMTR-G1
Diodes Incorporated
-
TPS562200DDCR
Texas Instruments
-
AP62300TWU-7
Diodes Incorporated
-
MC34063EBD-TR
STMicroelectronics
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
