TLS835B2ELVSEXUMA1 - 350mA 40V Ultra-Low Iq LDO | Infineon
MPN: TLS835B2ELVSEXUMA1 β Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $1.57 | $1.57 |
| 10 | $1.48 | $14.80 |
| 100 | $1.32 | $132.00 |
| 500 | $1.18 | $590.00 |
| 1,000 | $1.05 | $1,050.00 |
TLS835B2ELVSEXUMA1 Overview
An LDO (Low-Dropout) linear regulator is a class of linear voltage regulator that maintains a stable, low-ripple output voltage even when the input voltage approaches the output rail. Within the broader power-management taxonomy, an LDO sits below a switching regulator but above a simple Zener reference, trading efficiency for low noise and fast transient response. The TLS835B2ELVSEXUMA1 targets always-on applications where quiescent current, not conversion efficiency, is the dominant design constraint.
The device features ultra-low typical quiescent current of 20 uA, an enable pin for power sequencing, and a wide operating junction temperature range of -40C to +150C (automotive AEC-Q100 grade). The exposed-pad SSOP-14 package provides a low thermal resistance path, enabling sustained 350 mA output without external heatsinking at moderate VIN-VO drops. Output current limiting and overtemperature shutdown are integrated.
Internally, the TLS835 uses a P-channel pass element topology optimized for low dropout and very low ground current, plus an internal bandgap reference trimmed for high initial accuracy. The OPTIREG family architecture shares a common silicon platform with the TLS820 (200 mA variant), enabling scalability across the 3.0 V to 40 V input range.
Typical applications include automotive body and chassis ECUs, ADAS sensor power rails, industrial 24 V sensor supplies, and any always-on MCU rail that must survive load-dump transients on the 12 V/24 V automotive bus. The wide 40 V input rating makes the part tolerant of 24 V nominal industrial buses and automotive load-dump conditions.
When designing with this part, derate the power dissipation budget using the SSOP-14 thermal pad. Use input and output ceramic capacitors rated for the full 40 V input transients, and observe the 350 mA current limit when sourcing into high-capacitance loads.
This page synthesizes distributor pricing, same-family Infineon drop-in alternatives, and practical design notes that supplement the manufacturer datasheet.
Drop-in alternatives for TLS835B2ELVSEXUMA1 β same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TLS835B2ELVSEXUMA1 (same form factor and footprint) β differing in Package, Input Voltage Range, Maximum Output Current, Output Type, Product Family.
Quick Comparison Tool β Select alternative parts for side-by-side comparison:
TLS820B2ELVSEXUMA1
β Drop-Inπ Reference alternative (not in catalog)
TLS835B2ELVSEXUMA1
β Drop-Inβ In Stock
$1.05 / Unit
View Datasheet βTLS715B0EJV50XUMA1
β Drop-Inβ In Stock
$0.55 / Unit
View Datasheet βTLS835B2ELVSEXUMA1 Maximum Ratings & Electrical Characteristics
| Manufacturer | Infineon Technologies |
| Product Family | OPTIREG LINEAR TLS835 / TLS820 |
| Regulator Type | LDO Linear Voltage Regulator (Positive) |
| Output Configuration | Programmable (3.3 V or 5 V selectable) |
| Input Voltage Range | 3.0 V to 40 V |
| Output Voltage | 3.3 V or 5 V (selectable) |
| Output Voltage Precision | <= +/-2% |
| Maximum Output Current | 350 mA |
| Quiescent Current (typical) | 20 uA |
| Enable Pin | Yes |
| Operating Junction Temperature | -40C to +150C (TJ) |
| Package | PG-SSOP-14-5 (14-pin SSOP with exposed pad) |
| Package Dimensions | 0.154 inch (3.90 mm) body width |
| Mounting Type | Surface Mount |
| RoHS Status | Compliant (per Infineon product page) |
| Automotive Grade | AEC-Q100 qualified (per distributor listings) |
| Output Protection | Current limit, overtemperature shutdown |
TLS835B2ELVSEXUMA1 Pin Configuration
| Pin 1 | VIN β Input supply voltage (3.0 V to 40 V) |
| Pin 2 | VIN β Input supply voltage (parallel to pin 1 for lower impedance) |
| Pin 3 | VSEL β Output voltage select: HIGH = 5 V, LOW = 3.3 V (typical) |
| Pin 4 | EN β Enable input (active-high per Infineon brief) |
| Pin 5 | GND β Ground / exposed thermal pad |
| Pin 6 | NC β Not connected (per datasheet) |
| Pin 7 | NC β Not connected (per datasheet) |
| Pin 8 | NC β Not connected (per datasheet) |
| Pin 9 | NC β Not connected (per datasheet) |
| Pin 10 | VOUT β Regulated output voltage (3.3 V or 5 V) |
| Pin 11 | VOUT β Regulated output voltage (parallel to pin 10) |
| Pin 12 | NC β Not connected (per datasheet) |
| Pin 13 | NC β Not connected (per datasheet) |
| Pin 14 | NC β Not connected (per datasheet) |
Typical Applications
TLS835B2ELVSEXUMA1 is suitable for 6 applications: Automotive Body Control Module (BCM) Rails, Industrial 24 V Sensor and PLC Power Rails, ADAS Sensor Power (Camera / Radar Modules), Battery-Connected Always-On MCU Rails, HVAC and Climate Control ECUs, Charging Infrastructure Auxiliary Rails.
Automotive Body Control Module (BCM) Rails
The TLS835B2ELVSEXUMA1 is a strong fit for automotive Body Control Module rails because of its 3.0 V to 40 V input tolerance, which survives 12 V cranking transients and 24 V jump-start events without a pre-regulator. The 20 uA typical quiescent current keeps the always-on CAN/LIN standby rail viable for months without draining the vehicle battery, while 350 mA continuous output is ample for an MCU plus a few sensor loads. AEC-Q100 qualification with -40C to +150C junction rating covers under-hood and cabin deployment. Place input/output ceramics within 5 mm of the pins, and tie the exposed pad to a 1 sq cm copper pour to handle the 24 V-to-5 V drop at 350 mA (estimated 6.65 W worst case, requiring thermal derating).
Recommended
Industrial 24 V Sensor and PLC Power Rails
In industrial 24 V PLC and sensor-hub applications, the TLS835B2ELVSEXUMA1's 40 V maximum input directly accepts a 24 V nominal bus with 20% tolerance plus inductive spike margin. The selectable 3.3 V/5 V output lets one SKU power both 3.3 V MCU and 5 V CAN/RS-485 nodes without stocking two LDOs. The 350 mA output supports an MCU, isolated transceiver, and a few analog sensors simultaneously. Ultra-low 20 uA Iq reduces standby power in energy-conscious plants. Input capacitance must be rated >=50 V to absorb switching transients from inductive loads on the 24 V bus.
Recommended
ADAS Sensor Power (Camera / Radar Modules)
The TLS835B2ELVSEXUMA1 supplies clean power to ADAS camera and short-range radar modules where low noise on the analog rail is critical. The LDO's lack of switching ripple avoids coupling into image-sensor analog front-ends and millimeter-wave VCO supplies, where even a few millivolts of ripple would degrade SNR. The 3.0 V to 40 V input lets the LDO sit downstream of a 12 V automotive feed without an extra pre-regulator, while the 350 mA budget covers the sensor plus serializer. The exposed-pad SSOP-14 allows sustained operation in confined, high-ambient-temperature enclosures typical of behind-bumper mounting.
Recommended
Battery-Connected Always-On MCU Rails
For battery-powered IoT gateways and asset trackers that must survive months on a single cell, the TLS835B2ELVSEXUMA1's 20 uA quiescent current is the headline advantage. Connected directly to a 12 V lead-acid or multi-cell Li-ion stack, the LDO delivers a stable 3.3 V or 5 V rail to a low-power MCU in deep-sleep, with 350 mA available for periodic wake-and-transmit bursts. The 40 V input ceiling absorbs alternator overshoot and battery hot-plug transients, while the enable pin supports sleep-mode shutdown. Use a low-leakage input divider if the source impedance is high.
Recommended
HVAC and Climate Control ECUs
In automotive HVAC and climate-control ECUs, the TLS835B2ELVSEXUMA1 powers the main MCU and sensor cluster directly from the 12 V battery bus. The wide 3.0 V to 40 V input range tolerates cranking dips and load-dump spikes, while the selectable 3.3 V or 5 V output matches the chosen MCU. The 350 mA output comfortably drives the MCU, NTC temperature sensors, and blower-driver logic. The exposed-pad SSOP-14 dissipates heat into the ECU housing's copper pour, eliminating the need for an external heatsink in a sealed module.
Recommended
Charging Infrastructure Auxiliary Rails
On-board EV charger (OBC) and DC-DC converter auxiliary rails benefit from the TLS835B2ELVSEXUMA1's 40 V input tolerance and AEC-Q100 grade. The LDO provides a low-noise housekeeping supply for gate drivers, isolated communication ICs, and microcontroller bias, downstream of a 12 V or 24 V auxiliary winding. The 350 mA output supports multiple low-power auxiliary loads, while the 20 uA Iq minimizes quiescent losses when the vehicle is parked. The exposed pad dissipates the VIN-to-VOUT drop efficiently inside the charger housing.
Recommended
Recommended Products Summary
Engineering reference data for TLS835B2ELVSEXUMA1 β comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TLS820B2ELVSEXUMA1 | TLS715B0EJV50XUMA1 |
|---|---|---|---|
| Brand | Infineon | Infineon | Infineon |
| Package | PG-SSOP-14-5 | PG-SSOP-14-5 - same | PG-SSOP-14-5 - same |
| Output Current | 350 mA | 200 mA | 450 mA |
| Output Voltage | 3.3 V or 5 V (selectable) | 3.3 V or 5 V (selectable) | 5 V (fixed) |
Key Differentiators
- Higher 350 mA output vs 200 mA TLS820 family member (vs TLS820B2ELVSEXUMA1)
- Selectable 3.3 V / 5 V output with single SKU (vs TLS715B0EJV50XUMA1)
- Ultra-low 20 uA quiescent current for always-on rails (vs Generic 350 mA LDOs from other vendors)
Design Notes
Estimated: at VIN = 24 V, VOUT = 5 V, and 350 mA load, the device dissipates (24 - 5) * 0.35 = 6.65 W. The PG-SSOP-14-5 package with exposed pad requires at least 1 sq cm of copper pour on at least 2 oz copper to keep junction temperature rise within 60 C above ambient. Without proper copper, the part will enter thermal shutdown under sustained 350 mA load on a 24 V input. For 12 V input, dissipation is only (12 - 5) * 0.35 = 2.45 W and the part runs comfortably on the SSOP-14 footprint.
Place input and output ceramic capacitors as close as possible (within 3-5 mm) to the VIN and VOUT pins. Use a 1 uF X7R 50 V ceramic on the input to absorb 24 V bus transients and a 1 uF X7R 10 V ceramic on the output. Tie the exposed thermal pad (pin 5) directly to a top-layer copper pour that extends to inner layers via at least 5 thermal vias (0.3 mm drill, 1 mm pitch). This is mandatory for sustained 350 mA operation above 12 V input.
Do not exceed the 40 V absolute maximum input rating - the part has no internal input TVS clamp, so external transient protection (e.g., a 36 V TVS) is required for load-dump compliance on 12 V automotive buses. Also note that the VSEL pin defaults may differ between variants - check the VSEL threshold and required pull resistor in the datasheet. For new designs targeting the 200 mA member of the family, use TLS820B2ELVSEXUMA1 to avoid overpaying for unused current capability.
Compliance Information
AEC-Q100 qualification confirmed by Infineon OPTIREG product brief and distributor listings. RoHS and lead-free status confirmed by Infineon product page. Halogen-free status not explicitly confirmed in the provided web data.
