TC ma, Tiny CMOS LDO With Shutdown. General Description. Features. Applications. Package Types SOT-23 SC-70
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1 1 ma, Tiny CMOS LDO With Shutdown Features Space-saving -Pin SC-7 and SOT-23 Packages Extremely Low Operating Current for Longer Battery Life: 3 µa (typ.) Very Low Dropout Voltage Rated 1 ma Output Current Requires Only 1 µf Ceramic Output Capacitance High Output Voltage Accuracy: ±.% (typ.) 1 µs (typ.) Wake-Up Time from SHDN Power-Saving Shutdown Mode:. µa (typ.) Overcurrent and Overtemperature Protection Pin-Compatible Upgrade for Bipolar Regulators Applications Cellular/GSM/PHS Phones Battery-Operated Systems Portable Computers Medical Instruments Electronic Games Pagers General Description The is a high-accuracy (typically ±.%) CMOS upgrade for bipolar Low Dropout regulators (LDOs). It is offered in a SC-7 or The SC-7 package represents a % footprint reduction versus the popular SOT-23 package and is offered in two pinouts to make board layout easier. Developed specifically for battery-powered systems, the s CMOS construction consumes only 3 µa typical supply current over the entire 1 ma operating load range. This can be as much as 6 times less than the quiescent operating current consumed by bipolar LDOs. The is designed to be stable, over the entire input voltage and output current range, with low-value (1 µf) ceramic or tantalum capacitors. This helps to reduce board space and save cost. Additional integrated features, such as shutdown, overcurrent and overtemperature protection, further reduce the board space and cost of the entire voltage-regulating application. Key performance parameters for the include low dropout voltage (28 mv typical at 1 ma output current), low supply current while shutdown (. µa typical) and fast stable response to sudden input voltage and load changes. Package Types SC-7 SOT-23 NC NC R SHDN NC SHDN SHDN 2 Microchip Technology Inc. DS21813D-page 1
2 1. ELECTRICAL CHARACTERISTICS Absolute Maximum Ratings Input Voltage...6.V Power Dissipation... Internally Limited (Note 7) Maximum Voltage On Any Pin V to -.3V Notice: Stresses above those listed under "Maximum Ratings" may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operation listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability. PIN FUNCTION TABLE Name Function SHDN Shutdown control input. NC No connect Ground terminal Regulated voltage output Unregulated supply input ELECTRICAL CHARACTERISTICS Electrical Specifications: Unless otherwise noted, = V R + 1V, I L = 1 µa, C L = 1. µf, SHDN > V IH, T A = +2 C Boldface type specifications apply for junction temperatures of 4 C to +12 C. Parameter Sym Min Typ Max Units Test Conditions Input Operating Voltage V Note 1 Maximum Output Current I OUTMAX 1 ma Output Voltage V R 2.% V R ±.% V R + 2.% V Note 2 Coefficient TC 4 ppm/ C Note 3 Line Regulation (Δ /Δ ) / V R.4.2 %/V (V R + 1V) < < 6V Load Regulation (Note 4) Δ / V R % I L =.1 ma to I OUTMAX Dropout Voltage (Note ) mv I L = 1 µa I L = ma I L = 1 ma I L = 1 ma Supply Current I IN 3 9 µa SHDN = V IH, I L = Shutdown Supply Current I INSD. 2 µa SHDN = V Power Supply Rejection Ratio PSRR 8 db f =1 khz, I L = ma Wake-Up Time (from Shutdown Mode) t WK 1 µs = V, I L = 6 ma, C IN = C OUT =1 µf, f = 1 Hz Note 1: The minimum has to meet two conditions: 2.7V and (V R + 2.%) + V DROPOUT. 2: V R is the regulator voltage setting. For example: V R = 1.8V, 2.7V, 2.8V, 3.V. 3: ( MAX MIN ) 1 6 TC = V ΔT OUT 4: Regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from.1 ma to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification. : Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value at a 1V differential. 6: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to I LMAX at = 6V for t = 1 msec. 7: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction-to-air (i.e., T A, T J, θ JA ). Exceeding the maximum allowable power dissipation causes the device to initiate thermal shutdown. Please see Section.1 Thermal Shutdown, for more details. 8: Output current is limited to 12 ma (typ) when is less than.v due to a load fault or short-circuit condition. DS21813D-page 2 2 Microchip Technology Inc.
3 ELECTRICAL CHARACTERISTICS (CONTINUED) Electrical Specifications: Unless otherwise noted, = V R + 1V, I L = 1 µa, C L = 1. µf, SHDN > V IH, T A = +2 C Boldface type specifications apply for junction temperatures of 4 C to +12 C. Parameter Sym Min Typ Max Units Test Conditions Settling Time (from Shutdown mode) t S 32 µs = V, I L = 6 ma, C IN = 1 µf, C OUT = 1 µf, f = 1 Hz Output Short-Circuit Current I OUTSC 12 ma = V, Average Current (Note 8) Thermal Regulation /P D.4 V/W Notes 6, 7 Thermal Shutdown Die T SD 16 C Thermal Shutdown Hysteresis ΔT SD 1 C Output Noise en 8 nv/ Hz f = 1 khz SHDN Input High Threshold V IH 4 % = 2.7V to 6.V SHDN Input Low Threshold V IL 1 % = 2.7V to 6.V Note 1: The minimum has to meet two conditions: 2.7V and (V R + 2.%) + V DROPOUT. 2: V R is the regulator voltage setting. For example: V R = 1.8V, 2.7V, 2.8V, 3.V. 3: ( V V ) 1 6 OUTMAX OUTMIN TCV = OUT V ΔT OUT 4: Regulation is measured at a constant junction temperature using low duty-cycle pulse testing. Load regulation is tested over a load range from.1 ma to the maximum specified output current. Changes in output voltage due to heating effects are covered by the thermal regulation specification. : Dropout voltage is defined as the input-to-output differential at which the output voltage drops 2% below its nominal value at a 1V differential. 6: Thermal regulation is defined as the change in output voltage at a time T after a change in power dissipation is applied, excluding load or line regulation effects. Specifications are for a current pulse equal to I LMAX at = 6V for t = 1 msec. 7: The maximum allowable power dissipation is a function of ambient temperature, the maximum allowable junction temperature and the thermal resistance from junction-to-air (i.e., T A, T J, θ JA ). Exceeding the maximum allowable power dissipation causes the device to initiate thermal shutdown. Please see Section.1 Thermal Shutdown, for more details. 8: Output current is limited to 12 ma (typ) when is less than.v due to a load fault or short-circuit condition. TEMPERATURE CHARACTERISTICS Electrical Specifications: Unless otherwise indicated, V DD = +2.7V to +6.V and V SS =. Parameters Sym Min Typ Max Units Conditions Ranges Specified Range T A C Extended parts Operating Range T A C Storage Range T A C Thermal Package Resistances3 Thermal Resistance, L-SOT23 θ JA 2 C/W Thermal Resistance, L-SC-7 θ JA 4 C/W 2 Microchip Technology Inc. DS21813D-page 3
4 -Lead Plastic Small Outline Transistor (OT) (SOT-23) E E1 p B p1 D n 1 α c A A2 β L φ A1 Units Dimension Limits Number of Pins n Pitch p Outside lead pitch (basic) p1 Overall Height A Molded Package Thickness A2 Standoff A1 Overall Width E Molded Package Width E1 Overall Length D Foot Length L Foot Angle φ Lead Thickness c Lead Width B Mold Draft Angle Top α Mold Draft Angle Bottom β * Controlling Parameter Significant Characteristic MIN INCHES* NOM MAX MILLIMETERS MIN NOM Notes: Dimensions D and E1 do not include mold flash or protrusions. Mold flash or protrusions shall not exceed.1 (.24mm) per side. JEDEC Equivalent: MO-178 Drawing No. C4-91 MAX DS21813D-page 18 2 Microchip Technology Inc.
5 PRODUCT IDENTIFICATION SYSTEM To order or obtain information, e.g., on pricing or delivery, refer to the factory or the listed sales office. PART NO. X.XX X Device Device: Voltage Options:* (Standard) Range: Package: Voltage Options : 1 ma Tiny CMOS LDO with Shutdown R:1 ma Tiny CMOS LDO with Shutdown (SC-7 only) 1.8V 1.8V 2.V SC-7 only 2.6V 2.7V 2.8V 2.8V 2.9V 3.V 3.2V SC-7 only 3.3V 4.V * Other voltage options available. Please contact your local Microchip sales office for details. V Range = -4 C to +12 C XXXX Package LTTR = -pin SC-7 (Tape and Reel) CTTR = -pin SOT-23 (Tape and Reel) Examples: a) -1.8VLTTR: 1 ma, Tiny CMOS SC-7 package. b) R-1.8VLTTR:1mA, Tiny CMOS SC-7R package. c) -2.6VCTTR: 1 ma, Tiny CMOS d) -2.7VLTTR: 1 ma, Tiny CMOS SC-7 package. e) -2.8VCTTR: 1 ma, Tiny CMOS f) -2.8VLTTR:1 ma, Tiny CMOS SC-7 package. g) -2.9VCTTR: 1 ma, Tiny CMOS h) -3.VLTTR: 1 ma, Tiny CMOS SC-7 package. i) -3.3VCTTR: 1 ma, Tiny CMOS j) -4.VLTTR: 1 ma, Tiny CMOS SC-7 package. 2 Microchip Technology Inc. DS21813D-page 19
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