STMicroelectronics STM6600CS25DM6F

Overview

STM6600CS25DM6F from STMicroelectronics is a smart push-button on/off controller with Smart Reset™ and power-on lockout functionality, designed for reliable system power sequencing in battery-powered portable electronics. It operates from 1.6 V to 5.5 V, draws only 0.6 µA in standby, features a precise 1.5 V ±1% voltage reference, and supports debounced PB/SR inputs with ±15 kV air-discharge ESD protection. Its enable output (EN/EN) directly controls external MOSFETs or DC-DC converters in handheld devices requiring secure startup and undervoltage-aware shutdown.

For engineers reviewing the STM6600CS25DM6F datasheet, STM6600CS25DM6F pinout, STM6600CS25DM6F application, or STM6600CS25DM6F equivalent, this device delivers deterministic power-up confirmation via PSHOLD timing, configurable Smart Reset™ delay via CSRD capacitor, and dual-mode long-push behavior (reset assertion or enable deassertion), making it critical for robust user-interface power control in space-constrained consumer electronics.

Technical Context

The STM6600CS25DM6F implements a state-machine-based power controller that monitors VCC against factory-trimmed thresholds (VTH+ = 3.4 V typ., VTH– hysteresis = 200 mV typ.) and validates startup via PSHOLD assertion within tON_BLANK. It integrates edge-detection debounce logic for PB and SR inputs, with tDEBOUNCE adjustable via supply voltage (15–30 ms range).

Its Smart Reset™ function uses CSRD capacitor charging (ISRD = 1.2 µA typ.) to set tSRD delay before long-push recognition, while internal 100 kΩ pull-up on PB and optional pull-up on SR ensure defined logic states. The device asserts RST for tREC (200 ms typ.) during valid power-up or long-push events, and drives INT low on either PB press or VCC dropout below VTH–.

Key Specifications

Pinout & Package

STM6600CS25DM6F is housed in a TDFN12 (2 mm × 3 mm, 0.5 mm pitch) package with wettable flanks, optimized for automated optical inspection and high-density PCB layouts in portable form factors.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar smart push-button power control applications.

Compared with TPS3808G01DBVR and MAX16050ETA+, the STM6600CS25DM6F uniquely integrates push-button state machine, PSHOLD-validated startup, and Smart Reset™ delay into a single TDFN12 package-eliminating firmware dependencies and external components needed for secure, low-power, user-interactive power management.

Availability

STM6600CS25DM6F is available at Aetrix Electronics and suitable for portable medical devices, industrial handheld terminals, wireless audio players, and smart wearables requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.

Supply support for STM6600CS25DM6F 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power management ICs, sensors, and analog products for industrial, automotive, and consumer markets.

The STM6600 series belongs to ST's Smart Power Controllers product line, engineered specifically to replace discrete button+RC+MOSFET power solutions with integrated, ESD-hardened, low-quiescent-current controllers for battery-operated portable electronics.

FAQ

What is the function of the PSHOLD pin and why is it required?

The PSHOLD pin confirms successful system power-up by requiring the host processor to drive it high within tON_BLANK (typically 100–200 ms). This prevents enabling system power if the MCU fails to initialize-ensuring no undefined behavior occurs due to incomplete firmware boot. It is mandatory for secure startup and cannot be omitted in designs using STM6600CS25DM6F.

Can the STM6600CS25DM6F be used without connecting the VREF pin?

Yes, but a 1 µF capacitor must still be connected from VREF to GND-even if the 1.5 V reference is unused. This capacitor stabilizes internal bandgap circuitry and is required for proper device operation; omitting it causes erratic reset behavior and invalid voltage threshold detection per datasheet Section 2.

How does the CSRD capacitor affect long-push detection timing?

The CSRD capacitor sets tSRD-the additional time PB and SR must be held together before long-push recognition. With ISRD = 1.2 µA charging the capacitor to VSRD ≈ 1.2 V, a 100 nF capacitor yields tSRD ≈ 100 ms. Larger values linearly increase delay, enabling precise tuning from near-zero to over 1 second without firmware changes.

Is the EN output push-pull or open-drain, and can it drive a high-side MOSFET directly?

The EN output is push-pull (active-high) by default and can directly drive the gate of a logic-level N-channel MOSFET configured as a high-side switch. For P-channel high-side use, the EN pin must be inverted externally or the EN variant (active-low, open-drain) selected-though STM6600CS25DM6F specifically uses EN (push-pull high).