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ABLIC Launches the S-19954/5 Series of Automotive Step-down Switching Regulators Operating at 5.5V and with a 1A Output in the Industry’s Smallest Package

—The small number of external parts and the industry’s smallest mounting area contribute to downsizing in automotive camera modules —

 

 

 

 ABLIC (President: Seiji Tanaka, Head Office: Minato-ku, Tokyo; hereinafter “ABLIC”), a group company of MinebeaMitsumi Inc., today launched the S-19954/5 Series of automotive step-down switching regulators.
 Viewing cameras and sensing cameras are vital for ADAS (Advanced Driver Assistance Systems) and AD (Autonomous Driving Systems), and with recent advances in technological innovation in automotive technologies, especially in the field of CASE (Connected, Autonomous, Shared & Services and Electrification), there has been an increase in both the number of these devices installed in automobiles and in the resolution of the devices installed.
However, higher resolution automotive cameras image sensors also have higher current consumption, which means that using conventional LDO regulators will increase heat generation. As such, switching regulators with high power conversion efficiency are often used as a solution to the heat problem, however the compared to LDO regulators, switching regulators require a greater number of peripheral components, which creates an additional problem of a larger required mounting area.
 The new S-19954/5 Series launched today is a step-down switching regulator which operates at 5.5V with a 1A output and is housed in an HSNT-8(1616)B package (which is the industry’s smallest package (*1) at 1.6 x 1.6 x t0.41mm). In addition, while the circuit configuration of conventional switching regulators required five or more external components, the S-19954/5 Series has an integrated feedback resistance circuit (*2) and phase compensation circuit (*3) to set output voltage, which makes it possible to configure an application circuit using just one small coil and two capacitors. These characteristics allow the S-19954/5 Series to achieve the industry’s smallest mounting area (*4), a 45% reduction compared to conventional products, which in turn contributes to downsizing of camera modules.
The S-19954/5 Series is also equipped with a power good function to monitor the output voltage of the IC and ensure it stays within the normal range, so if the output voltage deviates from the specified range, the function raises an error flag to notify the microcontroller, which improves overall system safety.
 The S-19954/5 Series is also PPAP (Production Part Approval Process) capable and planned for compliance with Grade 1 of the AEC (*)-Q100 (*Automotive Electronics Council) quality standard for automotive ICs.

 

Major Features 

  1. Features the industry’s smallest ultra-compact package, and utilizes fewer peripheral components to achieve the industry’s smallest mounting area
    The S-19954/5 Series is a step-down switching regulator which operates at 5.5V with a 1A output housed in the industry’s smallest (*1) HSNT-8(1616)B (1.6 x 1.6 x t0.41mm) package. This product contributes to downsizing of ECUs, which are being integrated into vehicles in ever-growing quantities. Also available in a gull-wing type HTMSOP-8 (2.9 x 4.0 x t0.8mm) (*5) package.
    The S-19954/5 Series also has an integrated feedback resistance circuit and phase compensation circuit to set output voltage which allows for configuration of an application circuit with a minimum of just one small coil and two capacitors as peripheral components, and this reduction of components makes it possible to configure application circuits with the smallest mounting area in the industry.
  2. Power Good function for improved system safety
    The S-19954/5 Series has an integrated overcurrent protection circuit and thermal shutdown circuit in addition to a power good function that monitors output voltage, ensuring it stays within the normal range. The power good function improves system safety by raising an error flag to notify the microcontroller if the output voltage deviates from the specified range.
  3. Industry’s top class high efficiency
    The S-19954/5 Series achieves higher efficiency conversion than products with similar functionality which places it in the industry’s top class (95% at an input voltage of 4V and an output voltage of 3.3V).
  4. Selectable PWM control or PWM/PFM control
    Available with either PWM control (S-19954 Series) or PWM/PFM switching control (S-19955 Series). The S-19955 Series features a proprietary PWM/PFM switching technology with PFM control which is capable of delivering constant voltage output from VOUT without excessive ripple voltage. The release of the S-19954/5 Series has allowed us to expand our lineup of products which support downsizing and improved performance for automotive cameras to better satisfy customer demand.

 

Major Specifications

・ Input voltage
   2.7 to 5.5V
・ Output voltage
   0.8 to 3.3V
  ・ Output current
  1A
・ VOUT pin voltage accuracy
    ±1.5%, (Tj = -40℃ to +125℃ )
・ Efficiency
 95% max. ≤
・ Oscillation frequency
    2.25MHz typ.
・Overcurrent protection function
    1.75A (pulse-by-pulse method)
・ Thermal shutdown function
    170°C detection temperature
・ Short-circuit protection function
    selectable either Hiccup control or latch control
・100% duty cycle operation
 ・Output discharge function
 “available” or “unavailable” can be selected for the output discharge function.
・ Power Good function
 Nch open-drain output
・Soft-start function
 0.35ms typ
・ Under voltage lockout function (UVLO)
    2.43V, typ.
・ Operation temperature range
 Ta = -40°C to +125°C
・ Lead-free (Sn 100%), halogen-free
・ AEC-Q100 in process (*6)

(*1, 4) As an automotive step-down switching regulator operating at 5.5V and with a 1A output. Based on our research as of January 2024.
(*2) A feedback resistance circuit is a resistance circuit used to set output voltage.
(*3) A phase compensation circuit is a circuit which suppresses oscillation to stabilize output voltage.
(*5) Under development
(*6) Contact our sales office for further details.

 

Simultaneously launched products

The S-19952/3 Series of automotive step-down switching regulators operating at 5.5V and with a 0.6A output

 

Application Examples
· Secondary power supplies for automotive devices
· Camera modules (View Camera Module, Sensing
  Camera Module, Drive Recorder, Driver Monitoring
  System)
· Automotive applications (engines, transmissions,
  suspensions, ABS, EVs/HEVs/PHEVs)

 

 

S-19954/5 Series Product Details

https://www.ablic.com/en/semicon/products/automotive/automotive-switching-regulator/s-19954-19955/

 

Website

 https://www.ablic.com/

 

This product has been certified as a MinebeaMitsumi Group “Green Product” for its outstanding contribution to the environment.

 

 

Contacts

ABLIC Inc.
Masae Onuma
E-mail: pr@ablic.com
https://hub.ablic.com/en/pr-inquiry?rf=support
Newsroom: www.mynewsdesk.com/ablic