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R8156 Series
36V Input 0.8% Accuracy 300mA Voltage Regulator

Product Specifications

The R8156 is CMOS-based voltage regulators featuring 300mA output current and 36V input voltage. Internally, the R8156 consists of a fold-back protection circuit, a short current protection circuit and a thermal shutdown circuit in addition to the basic regulator circuit. The performance is specified for 25°C with ±0.8% output voltage accuracy and for the −40°C to 125°C temperature range with ±1.0% output voltage accuracy. The operating temperature range is −40°C to 125°C and the maximum input voltage is 36 V. All these features allow the R8156 to become an ideal power source of automotive applications. The R8156 is offered in a 6-pin HSOP-8E high wattage package.


Input Voltage (Maximum Rating) 3.5 V to 36 V (50 V)
Operating Temperature Range -40°C to 125°C
Supply Current Typ. 75 µA
Standby Current Typ. 0.1 µA
Dropout Voltage Typ. 0.40 V (IOUT = 300 mA, VOUT = 5.0 V)
Output Voltage Accuracy ±0.8% (Ta = 25°C)
±1.0% (-40°C ≤ Ta ≤ 125°C)
Line Regulation Typ. 0.02%/V (VDD = VOUT +1 V to 36 V)
Packages HSOP-8E
Output Voltage Range 1.2 V / 1.5 V / 1.8 V / 3.3 V / 3.4 V / 5.0 V
Short-current Protection Circuit Current Limit Typ. 50 mA
Fold-back Protection Circuit Current Limit Typ. 450 mA
Thermal Shutdown Circuit Shutdown at Typ. 160°C
Ripple Rejection Typ. 70 dB (f = 100 Hz)
Ceramic Capacitor Compatible CIN = 1.0 µF or more, COUT = 4.7 µF or more


CIN=1.0µF, COUT=4.7µF


HSOP-8E5.2 mm × 6.2 mm


3 NC
5 NC
6 CE
7 NC

*) The GND pin must be wired together when it is mounted on board.

R8156 Series for Automotive

Ricoh is committed to providing a semiconductor device with the highest level of quality and reliability by restricting the device manufacturing only within Ricoh and the cooperative companies successfully passed our stringent inspections for automotive products. Ricoh established a traceability system and manages manufacturing information and logistics information from the warehouse.

Quality Ranks for Applications

Ricoh offers three different quality ranks for automotive products according to their application purposes.
R8156 Series offer products in Rank 1.

Rank 1: Safety-Critical Automotive Parts (Operation Control System)

  • Power source for operation control equipments such as power steering, shift by wire, and TPMS

AEC-Q100 Grade 1 Compliant


R8156 Series operate PRODUCT LONGEVITY PROGRAM (ten-year supply is maintained as of January, 2016).
This program has been introduced to help customers select the most appropriate part for applications that require long life cycles.

Operating Temperature Range : -40°C to 125°C

Tjmax 150°C

R8156 Series are rated at high temperature of Tjmax = 150°C. The power dissipation is also rated at high temperature.


The set output voltage and the auto-discharge option are user-selectable options.

Product Name   Package Quantity per Reel
R8156Sxx1#-E2-FE AutomotiveSafety-Critical Automotive PartsAEC-Q100PLP HSOP-8E 1,000
  • xx … Specify the set output voltage (VSET) from below.
    1.2 V (12) / 1.5 V (15) / 1.8 V (18) / 3.3 V (33) / 3.4 V (34) / 5.0 V (50)
  • # … Specify the auto-discharge option.
    B: Auto-discharge option not included
    D: Auto-discharge option included

* Auto-discharge function quickly lowers the output voltage to 0 V, when the chip enable signal is switched from the active mode to the standby mode, by releasing the electrical charge accumulated in the external capacitor.

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