DatasheetsPDF.com

R1172x Dataheets PDF



Part Number R1172x
Manufacturers RICOH
Logo RICOH
Description SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO
Datasheet R1172x DatasheetR1172x Datasheet (PDF)

R1172x SERIES SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO NO.EA-122-070627 OUTLINE The R1172x Series are CMOS-based positive voltage regulator ICs. The R1172x Series have features of super low dropout, 1A output current capability. Even the output voltage is set at 1.5V, on resistance of internal FET is typically 0.32Ω. Therefore, applications that require a large current at small dropout are suitable for the R1172x series. Low input voltage is acceptable and low output voltage can be set. The.

  R1172x   R1172x


Document
R1172x SERIES SUPER LOW ON RESISTANCE / LOW VOLTAGE 1A LDO NO.EA-122-070627 OUTLINE The R1172x Series are CMOS-based positive voltage regulator ICs. The R1172x Series have features of super low dropout, 1A output current capability. Even the output voltage is set at 1.5V, on resistance of internal FET is typically 0.32Ω. Therefore, applications that require a large current at small dropout are suitable for the R1172x series. Low input voltage is acceptable and low output voltage can be set. The minimum input voltage is 1.4V, and the lowest set output voltage is 0.8V. Each of these ICs consists of a voltage reference unit, an error amplifier, resistor net for setting output voltage, a current limit circuit at over-current, a chip enable circuit, a thermal-shutdown circuit, and so on. A stand-by mode with ultra low consumption current can be realized with the chip enable pin. The output voltage of R1172 is fixed in the IC. Since the packages for these ICs are SOT-23-5, SOT-89-5, HSON-6, and HSOP-6J with high power dissipation, high density mounting of the ICs on boards is possible. FEATURES • • • • • • • • • • • • • • • • • Output Current ............................................................ 1A Supply Current ............................................................. Typ. 60µA Standby Current .......................................................... Typ. 0.1µA Input Voltage Range ................................................... 1.4V to 6.0V Output Voltage.............................................................. Stepwise setting with a step of 0.1V in the range of 0.8V to 5.0V (Exceptions: HSOP-6J = 0.8V to 3.5V) Dropout Voltage............................................................ Typ. 0.32V (VOUT=1.5V, IOUT=1A) Typ. 0.18V (VOUT=2.8V, IOUT=1A) Ripple Rejection ........................................................... Typ. 70dB (VOUT=2.8V) Output Voltage Accuracy.............................................. ±2.0% Temperature-Drift Coefficient of Output Voltage .......... Typ. ±100ppm/°C Line Regulation ............................................................ Typ. 0.05%/V Load Regulation ......................................................... Typ. 15mV at IOUT=300mA, Typ. 50mV at IOUT=1A Packages .................................................................... SOT-23-5, SOT-89-5, HSON-6, HSOP-6J Built-in Inrush current limit circuit ............................... Typ. 500 mA Built-in Fold-Back Protection Circuit ........................... Typ. 250mA (Current at short mode) Built-in Thermal Shutdown Circuit .............................. Thermal Shutdown Temperature ; Typ. 150°C Released Temperature ; Typ. 120°C Built-in Auto Discharge Function ................................ D version Output capacitors ....................................................... CIN=COUT=Tantalum 4.7µF (VOUT < 1.0V) CIN=COUT=Ceramic 4.7µF (VOUT > = 1.0V) APPLICATIONS www.DataSheet4U.com • Local Power source for Notebook PC. • Local Power source for portable communication equipments, cameras, and VCRs. • Local Power source for home appliances. 1 R1172x BLOCK DIAGRAMS R1172xxx1A VDD VOUT Vref Current Limit Thermal Shutdown CE GND R1172xxx1B VDD VOUT R1172xxx1D VDD VOUT Vref Current Limit Thermal Shutdown Vref Current Limit Thermal Shutdown CE GND CE GND SELECTION GUIDE The output voltage, auto discharge function*, and the package type for the ICs can be selected at the user’s request. The selection can be made with designating the part number as shown below; R1172xxx1x-xx-x ←Part Number ↑ ↑ a b Code a ↑ ↑ ↑ c d e Contents Designation of Package Type; N: SOT-23-5, H: SOT-89-5, D: HSON-6, S: HSOP-6J Setting Output Voltage (VOUT); Stepwise setting with a step of 0.1V in the range of 0.8V to 5.0V (HSOP-6J : 0.8V to 3.5V) is possible. Exceptions; 1.85V output: R1172x181x5-xx-x, 2.85V output: R1172x281x5-xx-x Designation of option; A: active low, without auto discharge function* B: active high, without auto discharge function* D: active high, with auto discharge function* Designation of Taping Type; T1 (SOT-89-5), TR (SOT-23-5, HSON-6), E2 (HSOP-6J) Refer to Taping Specifications. Designation of composition of pin plating; -F: Lead free plating b c www.DataSheet4U.com d e *) When the mode is into standby with CE signal, auto discharge transistor turns on, and it makes the turn-off speed faster than normal type. 2 R1172x PIN CONFIGURATIONS SOT-23-5 5 4 SOT-89-5 5 4 (mark side) 1 2 3 1 2 3 HSON-6 Top View 6 5 4 HSOP-6J 6 5 4 Bottom View 4 5 6 ∗ ∗ ∗ 1 2 3 3 2 1 1 2 3 PIN DESCRIPTIONS • SOT-23-5 Pin No. 1 Symbol VOUT Description Voltage Regulator Output Pin • SOT-89-5 Pin No. 1 Symbol CE or CE Description Chip Enable Pin Ground Pin No Connection Input Pin 2 3 4 5 GND VDD NC CE or CE Ground Pin Input Pin No Connection 2 3 4 GND NC VDD Chip Enable Pin 5 • HSOP-6J VOUT Voltage Regulator Output Pin • HSON-6*1 Pin No. 1 2 3 Symbol VOUT*2 VOUT* 2 .


SN8P2501B R1172x GP1S29


@ 2014 :: Datasheetspdf.com :: Semiconductors datasheet search & download site.
(Privacy Policy & Contact)