LDK120 200 mA low quiescent current very low noise LDO Datasheet - production data Applications * Mobile phones * Personal digital assistants (PDAs) 627/ ')1 [PP * Cordless phones and similar battery-powered systems * Digital still cameras Description The LDK120 low drop voltage regulator provides 200 mA of maximum current from an input supply voltage in the range of 1.9 V to 5.5 V, with a typical dropout voltage of 100 mV. 627/ It is stabilized with a ceramic capacitor on the output. Features * Input voltage from 1.9 to 5.5 V * Very low dropout voltage (100 mV typ. at 100 mA load) * Low quiescent current (max. 100 A, 1 A in OFF mode) * Very low noise * Output voltage tolerance: 2.0% @ 25 C The very low drop voltage, low quiescent current and low noise features make it suitable for low power battery-powered applications. An enable logic control function puts the LDK120 in shutdown mode allowing a total current consumption lower than 1 A. The device also includes a short-circuit constant current limiting and thermal protection. * 200 mA guaranteed output current * Wide range of fixed output voltages available on request: from 0.8 V to 3.5 V with 100 mV step * Adjustable version: from 0.8 V to VIN-Vdrop * Logic-controlled electronic shutdown * Compatible with ceramic capacitor COUT = 1 F * Internal current and thermal limit * Available in SOT23-5L, SOT323-5L and DFN6 (1.2 x 1.3 mm) packages * Temperature range: -40 C to 125 C October 2014 This is information on a product in full production. DocID023965 Rev 7 1/24 www.st.com 24 Contents LDK120 Contents 1 Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 3 Typical application . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 4 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 5 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 6 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 8 Packaging mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 9 Order codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 10 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 2/24 DocID023965 Rev 7 LDK120 1 Diagram Diagram Figure 1. Block diagram DocID023965 Rev 7 3/24 Pin configuration 2 LDK120 Pin configuration Figure 2. Pin connection (top view) #:1"%+/$ SOT23-5L, SOT323-5L DFN6 (1.2 x 1.3) Table 1. Pin description (SOT23-5L, SOT323-5L) Pin Function Symbol SOT23/ SOT323 DFN6 1 6 IN Input voltage of the LDO 2 2 GND Common ground 3 4 EN Enable pin logic input: Low = shutdown, High = active 4 3 BYP(1)/ADJ /NC 5 1 OUT Output voltage of the LDO - 5 N/C Not connected. This pin should be connected to GND Fixed Bypass capacitor Adjustable Adjustable pin D version Internally not connected 1. Bypass capacitor for noise reduction on fixed version is optional, if not used the relevant pin must be left floating with no routing on the board. 4/24 DocID023965 Rev 7 LDK120 3 Typical application Typical application Figure 3. Typical application circuits for fixed version 287 ,1 9, (1 *1' %<3$66 &,) 21 9R &R) &%<3 2)) Figure 4. Typical application circuits for D version ,1 9, 287 (1 *1' &,) 9R &R) 21 2)) Figure 5. Typical application circuits for adjustable version VO=VADJ (1+R1/R2) DocID023965 Rev 7 5/24 Maximum ratings 4 LDK120 Maximum ratings Table 2. Absolute maximum ratings Symbol VIN DC input voltage Value Unit - 0.3 to 7 V VOUT DC output voltage - 0.3 to VI + 0.3 V VEN Enable input voltage - 0.3 to VI + 0.3 V 2 V Output current Internally limited mA Power dissipation Internally limited mW VBYP/ADJ IOUT PD Note: Parameter ADJ/Bypass pin voltage TSTG Storage temperature range - 65 to 150 C TOP Operating junction temperature range - 40 to 125 C Absolute maximum ratings are those values beyond which damage to the device may occur. Functional operation under these conditions is not implied. All values are referred to GND. Table 3. Thermal data Symbol 6/24 Parameter SOT23-5L SOT323-5L DFN-6L Unit RthJA Thermal resistance junction-ambient 160 246 237 C/W RthJC Thermal resistance junction-case 68 134 104 C/W DocID023965 Rev 7 LDK120 5 Electrical characteristics Electrical characteristics TJ = 25 C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 F, IOUT = 1 mA, VEN = VIN, unless otherwise specified. Table 4. Electrical characteristics for LDK120 (fixed version) Symbol Parameter VIN Operating input voltage VOUT VOUT accuracy Test conditions Min. Typ. Max. Unit 1.9 5.5 V IOUT=1 mA, TJ=25 C -2.0 2.0 % IOUT=1 mA, -40 C