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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
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APPLICATIONS
• Local Power source for Notebook PC. • Local Power source for portable communication equipments, cameras, and videos. • Local Power source for home appliances.
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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
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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
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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.