RT9161/A. 300/500mA Low Dropout Linear Voltage Regulator. General Description. Features. Ordering Information RT9161/A- Applications

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1 3/5mA Low Dropout Linear Voltage Regulator R96/A General Description he R96/A is a 3/5mA fixed output voltage low dropout linear regulator. ypical ground current is approximately μa, from zero to maximum loading conditions. Wide range of available output voltage fits most of applications. Built-in output current-limiting most thermal-limiting provide maximal protection against any fault conditions. For ease of application, the R96/A comes in the popular 3-pin SO-23 (3mA), SO-89 (3mA), SO-223 (5mA), or O-92 packages. Ordering Information R96/A- Package ype V : SO-23-3 X : SO-89 G : SO-223 ZL : O-92 (L-ype) Z : O-92 (-ype) Lead Plating System P : Pb Free G : Green (Halogen Free and Pb Free) 5 :.5V 6 :.6V : 49 : 4.9V 5 : 5.V 5mA Output Current 3mA Output Current Note : Richtek products are : RoHS compliant and compatible with the current requirements of IPC/JEDEC J-SD-2. Suitable for use in SnPb or Pb-free soldering processes. Features Low Dropout Voltage of 2mV at Output Current ma, 45mV at Output Current 3mA, and 75mV at 5mA Output Current Guaranteed 3/5mA Output Current Internal.5Ω P-MOSFE Draws No Base Current Low Ground Current μa 2% Accuracy Input Voltage Range up to 2V Extremely ight Load Regulation Fast ransient Response Current-limiting and hermal-limiting RoHS Compliant and % Lead (Pb)-Free Applications Voltage Regulator for LAN Card, CD-ROM, and DVD Wireless Communication Systems Battery Powered Systems Marking Information For marking information, contact our sales representative directly or through a Richtek distributor located in your area. Pin Configurations 3 2 VOU SO-23-3 (OP VIEW) 2 3 (AB) SO-89 VOU 2 3 (AB) VOU SO-223 DS96/A-35 April 2

2 R96/A 3 VOU 2 O-92 (L-ype) 3 VOU 2 O-92 (-ype) ypical Application Circuit R96/A V IN C IN uf + VOU + C OU uf V OU Electrolytic Functional Pin Description Pin Name VOU Pin Function. Ground. Power Input. Function Block Diagram VOU Current Limiting Sensor Error Amp - + hermal Shutdown.2V Reference 2 DS96/A-35 April 2

3 Absolute Maximum Ratings R96/A Input Voltage to 4V Operating Junction emperature Range C to 25 C Storage emperature Range C to 5 C Power Dissipation, P A = 25 C SO W SO W SO W O W Package hermal Resistance (Note ) SO-23-3, θ JA C/W SO-23-3, θ JC C/W SO-89, θ JA C/W SO-89, θ JC C/W SO-223, θ JA C/W SO-223, θ JC C/W O-92, θ JA C/W O-92, θ JC C/W Electrical Characteristics (A = 25 C, CIN = μf, COU = μf, unless otherwise specified.) Parameter Symbol est Conditions Min yp Max Unit Accuracy ΔV OU I L = ma, V IN = 5V % emperature Coefficient PPM/ C Line Regulation ΔV LINE I L = ma, V IN = 4.5 to 2V %V OU Load Regulation (Note 2) ΔV LOAD I L = ma to 3/5mA, V IN = 5V -- 3/5 mv Current Limit (Note 3) R I LIM V IN = 5V, V OU = V R96A Dropout Voltage (Note 4) V DROP I L = 3/5mA -- 45/75 6/ mv Standby Current I SANDBY I L =, V IN = 2V -- 8 μa Note. θ JA is measured in the natural convection at A = 25 C on a low effective single layer thermal conductivity test board of JEDEC 5-3 thermal measurement standard. Note 2. Regulation is measured at constant junction temperature, using pulsed ON time. Note 3. Current Limit is measured at constant junction temperature, using pulsed ON time. Note 4. he dropout voltage is defined as V IN V OU, which is measured when V OU is V OU(NORMAL) mv. ma DS96/A-35 April 2 3

4 R96/A ypical Operating Characteristics 3.4 emperature Stability.4 Quiescient Current vs. emperature (V) 3.2 VOU = 3.3V VOU = 2.5V emperature ( C) Quiescient Current (ma) = 5V emperature ( C) Dropout Voltage (V IN -V OU ).4 Short Circuit Current Dropout Voltage (V) C 25 C VOU = 3.3V Short Circuit Current (A) C 25 C I Load (ma) Input/Output Differential (V) Input Voltage Deviation (V) > Line ransient Response C OU = μf Electrolytic I OU =.A ime ime (μs/div) (μs/div) V OU = 3.3V A = 25 C Input Voltage Deviation (V) > Line ransient Response C OU = μf Electrolytic I OU =.A ime (μs/div) (μs/div) V OU = 2.5V A = 25 C 4 DS96/A-35 April 2

5 R96/A Load Current (ma) > -5 Load ransient Response C IN = μf C OU = μf A = 25 C ime (μs/div) (μs/div) V IN = 5V V OU = 3.3V Load Current (ma) > Load ransient Response C IN = μf C OU = μf A = 25 C ime (μs/div) (μs/div) V IN = 5V V OU = 3.3V Load Current (ma) 6 C IN = μf 4 C OU = μf 2 A = 25 C > Load ransient Response ime (μs/div) (μs/div) V IN = 5V V OU = 2.5V Load Current (ma) > Load ransient Response C IN = μf C OU = μf A = 25 C ime (μs/div) (μs/div) V IN = 5V V OU = 2.5V PSRR (db) CIN = uf COU = uf antalum = 5V VOU = 3.3V A = 25 C PSRR ma PSRR (db) CIN = uf COU = uf antalum = 5V VOU = 2.5V A = 25 C PSRR ma -5 ma -6 K K K M Frequency (Hz) -5 ma -6 K K K M Frequency (Hz) DS96/A-35 April 2 5

6 R96/A Application Information A uf capacitor with 2mΩ or higher ESR, connecting between VOU and pins, is recommended for stability. A capacitor with ESR smaller than 2 mω may cause VOU oscillation as shown in Figure. Operating temperature should be well considered to ensure that the capacitance is no less than uf over the operating temperature range. Please take the notice that Aluminum electrolytic capacitors may cause VOU oscillation when operating below 25 C. he capacitance can be increased without limit for better transient response. A uf or higher capacitor should be placed between and to filter out input noise and ensure stable output voltage. COU ESR (Ω) Region of Stable C OU ESR vs. Load Current.. = 3.3V CIN = uf COU = uf 6 Figure hermal protection limits power dissipation in R96/A. When the operation junction temperature exceeds 65 C, the OP circuit starts the thermal shutdown function and turns the pass element off. he pass element turn on again after the junction temperature cools by 3 C. For continuous operation, do not exceed absolute maximum operation junction temperature 25 C. he power dissipation definition in device is : P D = (V IN V OU ) x I OU + V IN x I Q Stable Instable Load Current (ma) he maximum power dissipation depends on the thermal resistance of IC package, PCB layout, the rate of surroundings airflow and temperature difference between junction to ambient. he maximum power dissipation can be calculated by following formula : P D(MAX) = ( J(MAX) A ) / θ JA Where J(MAX) is the maximum operation junction temperature 25 C, A is the ambient temperature and the θ JA is the junction to ambient thermal resistance. For recommended operating conditions specification of R96/A, where J(MAX) is the maximum junction temperature of the die (25 C) and A is the maximum ambient temperature. he junction to ambient thermal resistance θ JA is layout dependent. For SO-223 packages, the thermal resistance θ JA is 35 C/W on the standard JEDEC 5-3 single-layer S thermal test board. he maximum power dissipation at A = 25 C can be calculated by following formula : P D(MAX) = ( 25 C 25 C ) / 25 =.4 W for SO-23-3 packages P D(MAX) = ( 25 C 25 C ) / 75 =.57 W for SO-89 packages P D(MAX) = ( 25 C 25 C ) / 35 =.74 W for SO-223 packages P D(MAX) = ( 25 C 25 C ) / 6 =.625 W for O-92 packages he maximum power dissipation depends on operating ambient temperature for fixed J(MAX) and thermal resistance θ JA. For R96/A packages, the Figure 2 of derating curves allows the designer to see the effect of rising ambient temperature on the maximum power allowed. Maximum Power Dissipation (mw) SO-23-3 package SO-223 package O-29 package SO-89 package Ambient emperature ( C) Figure 2. Derating Curves DS96/A-35 April 2

7 R96/A Outline Dimension D A E L e b C D A Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A b C D D E e L Lead O-92 Plastic Package DS96/A-35 April 2 7

8 R96/A D H L C B e A b A Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A B b C D e H L SO-23-3 Surface Mount Package 8 DS96/A-35 April 2

9 R96/A D D A C B C e e H A b b b Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A b B b C C D D e H Lead SO-89 Surface Mount Package DS96/A-35 April 2 9

10 R96/A Symbol Dimensions In Millimeters Dimensions In Inches Min Max Min Max A A b B C D b e H L L Lead SO-223 Surface Mount Package Richtek echnology Corporation Headquarter 5F, No. 2, aiyuen Street, Chupei City Hsinchu, aiwan, R.O.C. el: (8863) Fax: (8863)55266 Richtek echnology Corporation aipei Office (Marketing) 5F, No. 95, Minchiuan Road, Hsintien City aipei County, aiwan, R.O.C. el: (8862) Fax: (8862) marketing@richtek.com Information that is provided by Richtek echnology Corporation is believed to be accurate and reliable. Richtek reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. No third party intellectual property infringement of the applications should be guaranteed by users when integrating Richtek products into any application. No legal responsibility for any said applications is assumed by Richtek. DS96/A-35 April 2

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