L6932_05 STMICROELECTRONICS | Alldatasheet

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Technical content

■ 2V TO 14V INPUT VOLTAGE RANGE ■ 200mΩ Rdson MAX. ■ 200µA QUIESCENT CURRENT AT ANY LOAD ■ EXCELLENT LOAD AND LINE REGULATION ■ 1.5V, 1.8V AND 2.5V FIXED VOLTAGE ■ ADJUSTABLE FROM 1.2V TO 5V (L6932D1.2) ■ 1% VOLTAGE REGULATION ACCURACY ■ SHORT CIRCUIT PROTECTION ■ THERMAL SHUT DOWN ■ SO-8 (4+4) PACKAGE

APPLICATIONS

■ MOTHERBOARDS ■ MOBILE PC ■ HAND-HELD INSTRUMENTS ■ PCMCIA CARDS ■ PROCESSORS I/O ■ CHIPSET AND RAM SUPPLY

DESCRIPTION

The L6932 Ultra Low Drop Output linear regulator operates from 2V to 14V and is able to support 2A. Designed with an internal 50mΩ N-channel Mosfet, can be usefull for the DC-DC conversion between 2.5V and 1.5V at 2A in portable applica- tions reducing the power dissipation. L6932 is available in 1.5V, 1.8V, 2.5V and adj ver- sion from 1.2V and ensure a voltage regulation ac- curacy of 1%. The current limit is fixed at 2.5A to control the cur- rent in short circuit condition within ±8%. The cur- rent is sensed in the power mos in order to limit the power dissipation. The device is also provided of a thermal shut down that limits the internal temperature at 150°C with an histeresys of 20°C. L6932 provides the Enable and the Power good functions. SO-8 (4+4) ORDERING NUMBERS: L6932D1.2 (SO-8) L6932D1.2TR (T&R) L6932D1.5 (SO-8) L6932D1.5TR (T&R) L6932D1.8 (SO-8) L6932D1.8TR (T&R) L6932D2.5 (SO-8) L6932D2.5TR (T&R) HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR TYPICAL OPERATING CIRCUIT L6932D PGOOD EN GND INVIN 2V to 14V VOUT 1.5V-1.8V-2.5V C1 C2 2 3 5,6,7,8 L6932D ADJ EN GND INVIN 2V to 14V VOUT 1.2V to 5V C1 C2 2 4 5,6,7,8 OUT OUT Rev. 9

(*) Measured on Demoboard with about 4 cm 2 of dissipating area 2 Oz. N° L6232D 1.2 L6232D 1.5/1.8/ 2.5 1 EN Enables the device if connected to Vin and disables the device if forced to gnd. 2 IN Supply voltage. This pin is connected to the drain of the internal N-mos. Connect this pin to a capacitor larger than 10µF. ADJ – Connecting this pin to a voltage divider it is possible to programme the output voltage between 1.2V and 5V. – OUT Regulated output voltage. This pin is connected to the source of the internal N-mos. Connect this pin to a capacitor of 10µF. OUT – Regulated output voltage. This pin is connected to the source of the internal N-mos. Connect this pin to a capacitor of 10µF. – PGOOD Power good output. The pin is open drain and detects the output voltage. It is forced low if the output voltage is lower than 90% of the programmed voltage. 5, 6, 7, 8 GND Ground pin. Symbol Parameter Value Unit Vin VIN and Pgood 14.5 V EN, OUT and ADJ -0.3 to (V in +0.3) V Symbol Parameter Value Unit Rth J-amb Thermal Resistance Junction to Ambient 62 (*) °C/W Tmax Maximum Junction Temperature 150 °C Tstg Storage Temperature Range -65 to 150 °C EN IN ADJ OUT GND GND GND GND L6932D1.2 EN IN OUT PGOOD GND GND GND GND L6932D1.5 L6932D1.8 L6932D2.5

BLOCK DIAGRAM (Referred to the Fixed Voltage version) ELECTRICAL CHARACTERISTCS (Tj = 25°C, VIN = 5V unless otherwise specified) (*) Specification referred to Tj from -25°C to 125°C. Symbol Parameter Test Condition Min. Typ. Max. Unit Vin Operating Supply Voltage 2 14 V L6932D1.2 Line Regulation Vin = 2.5V ±10%; Io = 10mA 5 mV Vin = 3.3V ±10%; Io = 10mA 5 mV Vin = 5V ±10%; I o = 10mA 5 mV L6932D1.5 Line Regulation Vin = 2.5V ±10%; Io = 10mA 5 mV Vin = 3.3V ±10%; Io = 10mA 5 mV Vin = 5V ±10%; I o = 10mA 5 mV L6932D1.8 Line Regulation Vin = 2.5V ±10%; Io = 10mA 5 mV Vin = 3.3V ±10%; Io = 10mA 5 mV Vin = 5V ±10%; I o = 10mA 5 mV L6932D2.5 Line Regulation Vin = 3.3V ±10%; Io = 10mA 5 mV Vin = 5V ±10%; I o = 10mA 5 mV L6932D1.2 Load Regulation V in = 3.3V; 0.1A < Io < 2A 15 mV L6932D1.5 Load Regulation V in = 3.3V; 0.1A < Io < 2A 15 mV L6932D1.8 Load Regulation V in = 3.3V; 0.1A < Io < 2A 15 mV L6932D2.5 Load Regulation V in = 3.3V; 0.1A < Io < 2A 15 mV Rdson Drain Source ON resistance 200 m Ω REFERENCE VREF=1.25V CURRENT LIMIT THERMAL SENSORENABLEEN IN OUT PG GND CHARGE PUMP ERROR AMPL. DRIVERVREF

0.9 VREF

several applications they are ok, the loop stability issue has to be considered (see loop stability section). Below a list of some suggested capacitor manufacturers. The stability of the loop is affected by the zero introduced by the output capacitor. of nsec, depending also on the output voltage and current. high output voltages (adjustable version). the external divider, as shown in figure 9. Figure 9. Compensation Network

the device can handle is 1.5W. This means that the device is able to deliver a DC output current of 2A only with a very low dropout. stant time of the board, the thermal impedance (not the thermal resistance) has to be considered. Figure 10. Thermal Impedance thermal resistance (60°C/W to 70°C/W).

Figure 11. SO-8 Mechanical Data & Package Dimensions 0.15mm (.006inch) in total (both side).

Table 1. Revision History December 2005 9 Added new Ordering Numbers: L6932D1.5 & L6932D1.5TR.

Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publicati on are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectro nics. The ST logo is a registered trademark of STMicroelectronics. All other names are the property of their respective owners © 2005 STMicroelectronics - All rights reserved STMicroelectronics group of companies Australia - Belgium - Brazil - Canada - China - Czech Republic - Finland - France - Germany - Hong Kong - India - Israel - Ital y - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - United States of America L6932