1.2A, 36V, 2.1MHz Synchronous Step-Down Converter


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The RTQ2132B is a 1.2A, high-efficiency, current mode synchronous step-down converter which is optimized for automotive applications. The device operates with input voltages from 3V to 36V and is protected from load dump transients up to 42V, eases input surge protection design. The device can program the output voltage between 0.8V to VIN. The integrated low RDS(ON) power MOSFETs achieves high efficiency over the wide load range. The peak current mode control with simple external compensation allows the use of small inductors and results in fast transient response and good loop stability.

The RTQ2132B provides complete protection functions such as input under-voltage lockout, output-under voltage protection, over-current protection, and thermal shutdown. Cycle-by-cycle current limit provides protection against shorted outputs and soft-start eliminates input current surge during start-up. The RTQ2132B is available in TSSOP-14 (Exposed Pad) package.


  • Automotive Systems
  • Car Camera Module and Car Cockpit Systems
  • Connected Car Systems
  • Point of Load Regulator in Distributed Power Systems
  • Digital Set Top Boxes
  • Broadband Communications
Key Spec.
Status Active
Vin (min) (V) 3
Vin (max) (V) 36
Number of Outputs 1
Vout (min) (V) 0.8
Output Adj. Method Fixed;Resistor
Iout (max) (A) 1.2
Current Limit (typ) (A) 1.8
Freq (typ) (kHz) 2100
Ext Sync No
Ron_HS (typ) (mOhm) 200
Ron_LS (typ) (mOhm) 160
Iq (typ) (mA) 1.1
Features AEC-Q100 Qualified;Adjustable Soft-Start;Current Mode Control;Cycle-by-Cycle Current Limit;Enable Input;Force PWM;OCP;Power Good;UVP
Package Type TSSOP-14(PP)
  • AEC-Q100 Grade 1 Qualified
  • Wide Input Voltage Range
    ► 3V to 36V
  • Tight Switching Frequency Variation 2.1MHz ±10% Over Operating Ambient Temperature
  • Wide Output Voltage Range : 0.8V to VIN
  • 5V Fixed Output Voltage (see Ordering Information for availability)
  • Maximum Output Current : 1.2A
  • Peak Current Mode Control
  • Integrated 200mΩ Switch and 160mΩ Synchronous Rectifier
  • Built-In Spread-Spectrum Frequency Modulation for Low EMI
  • Externally Adjustable Soft-Start
  • Power Good Indication
  • Enable Control
  • 0.8V ±1.5% CV Reference Accuracy
  • Adjacent Pin-Short Protection
  • Built-In UVLO, UVP, OTP
TitleLast UpdateShareDownload
1.2A, 36V, 2.1MHz Synchronous Step-Down Converter2018/07/20
Reference Design
TitleLast UpdateShareDownload
Richtek Load Transient Tool2019/01/09
Design Tool
TitleLast UpdateShare
Pspice: RTQ2132B-QT2019/09/11
Part NumberPackage TypePackage Qty.Free SampleBuy From Authorized Distributor
RTQ2132BGCP-QTTSSOP-14(PP)2500 Request Buy from Distributor