Renesas UPD166020T1F-E1-AY

Overview

UPD166020T1F-E1-AY from Renesas Electronics is a single N-channel high-side power switch with integrated charge pump, load current sensing (K_ILIS = 8.3–11.0 k), short-circuit and overtemperature protection, and reverse-battery tolerance. It delivers ≤18 mΩ on-resistance at 7.5 A and 25°C, supports 14 V DC grounded loads up to 65 W, and is AEC-Q100 qualified for automotive lighting and fuse-replacement applications.

For engineers reviewing the UPD166020T1F-E1-AY datasheet, UPD166020T1F-E1-AY pinout, UPD166020T1F-E1-AY application, or UPD166020T1F-E1-AY equivalent, this device offers diagnostic feedback via proportional IS output, dynamic clamp for inductive load switching, and robust fault handling including latched shutdown and auto-restart after thermal cooldown.

Technical Context

The UPD166020T1F-E1-AY integrates a charge-pump-based gate driver enabling high-side N-MOSFET operation from a 12 V battery rail without external boost circuitry. Its control logic monitors V_ON, I_L, and channel temperature to trigger shutdown on overcurrent (IL(SC) = 10–200 A depending on V_CC−V_IN and V_ON), overload (V_ON(OvL) = 0.65–1.45 V), or overtemperature (T_th = 150–175°C).

Diagnostic functionality centers on the IS terminal: it provides proportional current sense (I_IS = I_L/K_ILIS) with offset <1 μA, saturation limit of 3.5–12 mA, and fault-state output of 3.5–12 mA. Reverse-battery protection activates the internal N-MOSFET body diode, limiting dissipation via R_on(rev) = 9.5–22 mΩ while requiring external load current limiting per R_IN < (|V_CC − 8 V|)/0.08 A.

Key Specifications

Pinout & Package

Package: 5-pin TO-252 (MP-3ZK), JEDEC standard, MSL Level 3, Pb-free Sn plating. Tab is electrically connected to Pin 3 (V_CC) and serves as primary thermal path.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-side switch applications.

Compared with UPD166020T1F-E1-AY, the BTS4140N trades off integration for broader voltage margin and simpler thermal design, while the VNQ7050AJ prioritizes conduction loss reduction at the expense of reverse-battery resilience and diagnostic fidelity.

Availability

UPD166020T1F-E1-AY is available at Aetrix Electronics and suitable for automotive lighting control, fuse-replacement systems, and 14 V DC grounded load switching requiring stable component supply, AEC-Q100 compliance, and long-term production continuity.

Supply support for UPD166020T1F-E1-AY 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

Renesas Electronics is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and IoT markets.

The UPD166020T1F-E1-AY belongs to Renesas' automotive-grade high-side switch product line, engineered specifically for replacing mechanical relays and fuses in 12 V vehicle electrical systems with enhanced diagnostics and transient robustness.

FAQ

What is the function of the IS pin on the UPD166020T1F-E1-AY?

The IS pin on the UPD166020T1F-E1-AY provides a proportional current-sense output (I_IS = I_L/K_ILIS) for real-time load monitoring. With K_ILIS ranging from 8.3 k to 11.0 k, it delivers diagnostic feedback for normal operation, and switches to a fixed 3.5–12 mA fault signal during short-circuit or overtemperature events. The UPD166020T1F-E1-AY specifies <1 μA offset and 3.5–12 mA saturation, enabling accurate ADC interfacing without external amplification.

Does the UPD166020T1F-E1-AY support reverse battery protection?

Yes, the UPD166020T1F-E1-AY supports reverse battery protection by self-turning-on its internal N-channel MOSFET body diode when V_CC is reversed to −16 V. This limits power dissipation using R_on(rev) = 9.5–22 mΩ and avoids external protection components. However, the connected load must limit reverse current per R_IN < (|V_CC − 8 V|)/0.08 A, as specified in the UPD166020T1F-E1-AY datasheet Section 3.6.3.

What is the maximum load current the UPD166020T1F-E1-AY can handle continuously?

The UPD166020T1F-E1-AY does not specify a single "maximum continuous current" rating; instead, its safe operating current depends on PCB thermal design. With 6 cm² of 70 μm copper on a 50 mm × 50 mm FR4 board, its R_th(ch-a) = 45°C/W allows ~7.5 A continuous at T_ch ≤ 150°C and V_CC = 12 V. At elevated ambient temperatures or reduced copper area, derating is required - the UPD166020T1F-E1-AY's thermal shutdown (150–175°C) and hysteresis (10°C) provide automatic protection.

How does the UPD166020T1F-E1-AY implement short-circuit protection?

The UPD166020T1F-E1-AY implements dual-mode short-circuit protection: (1) current-based detection (I_L > I_L(SC), adjustable from 10–200 A depending on V_CC−V_IN and V_ON), and (2) voltage-based overload detection (V_ON > 0.65–1.45 V after 0.65–3.8 ms delay). Both trigger latched shutdown with I_IS,fault output. The UPD166020T1F-E1-AY resumes operation only after IN is cycled - no auto-retry during fault condition.

Is the UPD166020T1F-E1-AY pin-compatible with other Renesas high-side switches?

No, the UPD166020T1F-E1-AY is not pin-compatible with other Renesas high-side switches such as the UPD166010 or μPD166030 series. Its 5-pin TO-252 (MP-3ZK) layout - with OUT duplicated on Pins 1 and 5, IN on Pin 2, V_CC/Tab on Pin 3, and IS on Pin 4 - is unique to this variant. Substituting other Renesas devices requires PCB redesign. The UPD166020T1F-E1-AY datasheet confirms this configuration in Section 3.2 and Package Drawing (Page 17).