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R1173x Dataheets PDF



Part Number R1173x
Manufacturers RICOH
Logo RICOH
Description Super low on resistance/Low voltage LDO
Datasheet R1173x DatasheetR1173x Datasheet (PDF)

www.DataSheet4U.com R1173x SERIES Super low on resistance/Low voltage LDO NO.EA-123-070828 OUTLINE The R1173x Series are CMOS-based positive voltage regulator ICs. The R1173x Series have features of super low dropout, 1A output current capability, and -3mV typical load regulation at 1A. 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 R1173x series. Low input volt.

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www.DataSheet4U.com R1173x SERIES Super low on resistance/Low voltage LDO NO.EA-123-070828 OUTLINE The R1173x Series are CMOS-based positive voltage regulator ICs. The R1173x Series have features of super low dropout, 1A output current capability, and -3mV typical load regulation at 1A. 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 R1173x 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 types of R1173 are fixed one in the IC and adjustable one (R1173x001x). Since the packages for these ICs are the SOT-89-5 package, HSON-6, or HSOP-6J, 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 Range (R1173xxx1) ............................ 0.8V to 5.0V (HSOP-6J: 0.8V to 3.5V) Output Voltage Range (R1173x001) ............................ 1.0V to VIN 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. −2mV (IOUT=300mA) Typ. −3mV (IOUT=1A) Packages ..................................................................... SOT-89-5, HSON-6, HSOP-6J Low inrush current at turning-on .................................. Typ. 500mA Built-in Current Limit Circuit ......................................... Typ. 250mA Output capacitors ......................................................... CIN=Ceramic 4.7µF COUT=Tantalum 4.7µF (VOUT<1.0V) COUT=Ceramic 4.7µF (VOUT > = 1.0V) Built-in Thermal Shutdown Circuit • APPLICATIONS • Local Power source for Notebook PC. • Local Power source for portable communication equipments, cameras, and videos. • Local Power source for home appliances. 1 www.DataSheet4U.com R1173x BLOCK DIAGRAMS R1173xxx1B VDD VOUT VDD R1173xxx1D VOUT Vref Current Limit Vref Current Limit CE GND CE GND R1173x001B VDD VOUT ADJ VDD R1173x001D VOUT ADJ Vref Current Limit Vref Current Limit CE GND CE GND 2 www.DataSheet4U.com R1173x SELECTION GUIDE The output voltage, auto discharge function*, the package type, etc. can be selected at the user's request. The selection can be made with the part number as follows; R1173xxx1x-xx-x ←Part Number ↑↑ a b Code A ↑ ↑ ↑ c d e Contents Package Type; H: SOT-89-5, D: HSON-6, S: HSOP-6J Designation of Output Voltage (VOUT) External Setting Type: 00 (ADJ pin voltage is fixed at 1.0V.) Fixed Type: 08 to 50 (Stepwise setting with 0.1V increment in the range from 0.8V to 5.0V, exceptions; 1.85V output: R1173x181x5-xx, 2.85V output: R1173x281x5-xx) Designation of Mask Option: B: Built-in Chip Enable Circuit, Active at "H", without auto discharge function* D: Built-in Chip Enable Circuit, Active at "H", with auto discharge function* Designation of Taping Type; T1 (SOT-89-5), TR (HSON-6), E2 (HSOP-6J) (Refer to Taping Specifications) Designation of composition of plating: −F: Lead free plating (SOT-89-5, HSON-6, HSOP-6J) b c 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. PIN CONFIGURATIONS SOT-89-5 Top View 5 4 HSON-6 Bottom View 4 5 6 6 HSOP-6J 5 4 6 5 4 ∗ ∗ 1 2 3 ∗ 3 2 1 1 2 3 1 2 3 3 www.DataSheet4U.com R1173x PIN DESCRIPTIONS SOT-89-5 Pin No. 1 2 3 4 5 Symbol ADJ or NC GND CE VDD VOUT Description ADJUST Pin (R1173H001x) No Connection (R1173Hxx1x) Ground Pin Chip Enable Pin Input Pin Output Pin 4 5 6 GND CE VDD HSON-6 Pin No. 1 2 3 Symbol VOUT VOUT ADJ or NC Description Output Pin Output Pin ADJUST Pin (R1173D001x) No Connection (R1173Dxx1x) Ground Pin Chip Enable Pin Input Pin * Tab in the parts have GND level. (They are connected to the back side of this IC.) Connect Pin1 and Pin2 as short as pos.


AP436 R1173x LT1933


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