RT9170-33PX Richtek Technology Corporation, RT9170-33PX Datasheet
RT9170-33PX
Available stocks
Related parts for RT9170-33PX
RT9170-33PX Summary of contents
Page 1
... A Quiescent Current CMOS LDO Regulator General Description The RT9170 is CMOS ultra low quiescent current and low dropout (ULDO) regulators. The devices are capable of supplying 300mA of output current continuously. The RT9170's performance is optimized for battery- powered systems to deliver 15μA ultra low quiescent current and extremely low dropout voltage ...
Page 2
... RT9170 Function Block Diagram EN www.richtek.com 2 V VIN VOUT RT9170- CB 1uF Chip Enable EN GND Pin Name CB RT9170 VIN 3 VOUT 1 GND Current Limit + & - Thermal Shutdown V OUT C OUT 1uF Pin Function Power Input Voltage Output Voltage Ground Chip Enable (Active Low) No Connection VIN ...
Page 3
... Enable 5.5V, Shutdown IH IN PSRR f = 1kHz 1μF OUT T SD 0.4W 0.4W − 65°C to 150°C − 40°C to 125°C Min Typ −2 -- 300 -- -- 15 = 0mA -- 240 −0.3 0.018 -- 0.01 -- 0 − 150 RT9170 Max Units + μ +0.3 %/V 0.04 %/mA μ °C -- www.richtek.com 3 ...
Page 4
... RT9170 Note 1. Stresses listed as the above "Absolute Maximum Ratings" may cause permanent damage to the device. These are for stress ratings. Functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may remain possibility to affect device reliability ...
Page 5
... 1uF (Ceramic) OUT 0 2 2.5 3 3.5 4 Supply Voltage (V) Output Voltage vs. Supply Voltage 2.55 2.53 2.51 2. 2.5V OUT C = 1uF (Ceramic) 2. 1uF (Ceramic) OUT I = 1mA LOAD 2.45 2.5 3 3.5 4 Supply Voltage (V) RT9170 0.2 0.25 0.3 No Load 4.5 5 5.5 4.5 5 5.5 www.richtek.com 5 ...
Page 6
... RT9170 Load Regulation Deviation vs. Temperature 0 -0.0005 -0.001 -0.0015 -0.002 -0.0025 -0.003 -0.0035 -0.004 V = 2.5V OUT -0.0045 -35 - Temperature PSRR 3. 2.5V OUT - 1uF (Ceramic) OUT - 10mA LOAD -30 -40 -50 -60 -70 10 100 1K Frequency (Hz) Enable Respone 3.3V 6 OUT C = 1uF (Ceramic 1uF (Ceramic) OUT I = 300mA LOAD ...
Page 7
... OUT 200 100 0 -100 -200 -300 Times (2.5ms/Div) DS9170-11 March 2007 C = 1uF (Ceramic 1uF (Ceramic) OUT ≈ 1uF (Ceramic 1uF (Ceramic) OUT RT9170 Line Transient Response 2.5V OUT OUT 25° OUT 4 3 ≈ 100 0 -100 Time (0.5ms/Div) = 1uF (Ceramic) = 250mA ≈ ...
Page 8
... DROPOUT IN OUT DS(ON) Current Limit The RT9170 monitors and controls the PMOS' gate voltage, limiting the output current to 0.3A (min). The output can be shorted to ground for an indefinite period of time without damaging the part. Short-Circuit Protection The device is short circuit protected and in the event of a peak over-current condition, the short-circuit control loop will rapidly drive the output PMOS pass element off ...
Page 9
... ESR is maximum. Thermal Considerations The RT9170 series can deliver a current 300mA over the full operating junction temperature range. However, the maximum output current must be derated at higher ambient temperature to ensure the junction temperature does not exceed 125° ...
Page 10
... RT9170 The final operating junction temperature for any set of conditions can be estimated by the following thermal equation : ) / θ (MAX) J (MAX Where T is the maximum junction temperature of J (MAX) the die (125° C) and T is the maximum ambient A temperature. The junction to ambient thermal resistance (θ ...
Page 11
... SOT-23-3 Surface Mount Package RT9170 H L Dimensions In Inches Min Max 0.035 0.051 0.000 0.006 0.055 0.071 0.014 0.020 0.102 0.118 0.106 0.122 0.071 0.079 ...
Page 12
... RT9170 Symbol www.richtek.com Dimensions In Millimeters Min Max 0.889 1.295 0.000 0.152 1.397 1.803 0.356 0.559 2.591 2.997 2.692 3.099 0.838 1.041 0.080 0.254 0.300 0.610 SOT-23-5 Surface Mount Package H L Dimensions In Inches Min Max 0.035 0.051 0.000 0.006 0.055 0.071 0.014 ...
Page 13
... No. 137, Lane 235, Paochiao Road, Hsintien City Taipei County, Taiwan, R.O.C. Tel: (8862)89191466 Fax: (8862)89191465 Email: marketing@richtek.com Dimensions In Inches Min Max 0.055 0.063 0.014 0.019 0.094 0.102 0.016 0.021 0.155 0.167 0.031 0.047 0.173 0.181 0.055 0.069 0.057 0.061 0.014 0.017 RT9170 www.richtek.com 13 ...