Datasheet

ManualsBrandsSTMICROELECTRONICS ManualsVoltage RegulatorsL6932H1.2TR

May 2007 Rev 2 1/13

L6932H1.2

High performance 2A ULDO linear regulator

Features

■ 2V to 14V input voltage range

■ 200mΩ r

DS(on)

max

■ 200µA quiescent current at any load

■ Excellent load and line regulation

■ Adjustable from 1.2V to 5V

■ 1% voltage regulation accuracy

■ Short circuit protection

■ Thermal shut down

■ HSOP8 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

output current up to 2A. Designed with an internal

50mΩ N-channel Mosfet, it can be used for

onboard DC-DC conversions saving in real

estate, list of components, low noise generation

and power dissipation.

L6932H1.2 is available as adjustable version from

1.2V to 5V with a voltage regulation accuracy of

1%.

The upper current limit is fixed at 2.5A to control

the current in short circuit condition within ±8%.

The current is sensed in the power mos in order

to limit the power dissipation.

The device is also provided with a thermal shut

down that limits the internal temperature at 150°C

with a histeresys of 20°C. L6932H1.2 provides the

Enable and the Power good functions

HSO-8

www.st.com

Figure 1. Typical operating circuit

L6932H1.2

Vout=1.2V to 5V

Vin=2V to 14V

Vin Vout

PGOOD

GND

NC2NC1

L6932H1.2

Vout=1.2V to 5V

Vin=2V to 14V

Vin Vout

PGOOD

GND

NC2NC1

Table 1. Device summary

Part number Package Packaging

L6932H1.2 HSO-8 Tube

L6932H1.2TR HSO-8 Tape and reel

Summary of content (13 pages)

PAGE 1
L6932H1.2 High performance 2A ULDO linear regulator Features ■ 2V to 14V input voltage range ■ 200mΩ rDS(on) max ■ 200µA quiescent current at any load ■ Excellent load and line regulation ■ Adjustable from 1.2V to 5V ■ 1% voltage regulation accuracy ■ Short circuit protection ■ Thermal shut down ■ HSOP8 package HSO-8 Description The L6932 Ultra Low Drop Output linear regulator operates from 2V to 14V and is able to support output current up to 2A.
PAGE 2
Contents L6932H1.2 Contents 1 2 Pin settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.1 Pin connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 1.2 Pin description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2.
PAGE 3
L6932H1.2 Pin settings 1 Pin settings 1.1 Pin connection Figure 2. 1.2 Pin connection (top view) EN 1 8 NC2 Vin 2 7 NC1 FB 3 6 GND Vout 4 5 PGOOD Pin description Table 2. Pin description Name Pin N° Description 1 EN Enables the device when connected to Vin and disables it when forced to GND. 2 VIN Supply voltage. This pin is connected to the drain of the internal N-mos. Connect this pin to a capacitor larger than 10µF.
PAGE 4
Maximum ratings L6932H1.2 2 Maximum ratings 2.1 Absolute maximum ratings Table 3. Absolute maximum ratings Symbol VIN 2.2 Parameter Value Unit VIN and PGOOD 14.5 V EN, OUT and ADJ -0.3 to (Vin +0.3) V Thermal data Table 4. Thermal data Symbol Parameter RthJA Maximum thermal resistance junction-ambient TMAX Maximum junction temperature TSTG Storage temperature range 1. Package mounted on board 3 Block diagram Figure 3.
PAGE 5
L6932H1.2 4 Electrical characteristics Electrical characteristics Table 5. Electrical characteristcs (TJ = 25°C, VIN = 5V unless otherwise specified) Symbol Parameter VIN Operating Supply Voltage VO Output voltage Line Regulation Load Regulation rDS(on) IOCC Test condition Max Unit Typ 14 V 1.212 V VIN = 2.5V ±10%; IO = 10mA 5 mV VIN = 3.3V ±10%; IO = 10mA 5 mV VIN = 5V ±10%; IO = 10mA 5 mV VIN = 3.3V; 0.1A < IO < 2A 15 mV 200 mΩ 2.5 2.7 A 0.2 0.4 mA 25 µA 2 IO = 0.
PAGE 6
Typical electrical performance 5 6/13 L6932H1.2 Typical electrical performance Figure 4. Output voltage vs junction temperature Figure 6. Shutdown current vs junction temperature Figure 5.
PAGE 7
L6932H1.2 Application information 6 Application information 6.1 Application circuit Figure 7. Demoboard application circuit Vin=2V to 14V Vout=1.2V to 5V Vin Vout 2 4 EN PGOOD L6932H1.2 1 5 C1 R3 R1 FB C2 3 6 GND 7 8 NC1 NC2 R2 1.2 V OUT = -------- × ( R 1 + R 2 ) R2 6.2 Demoboard layout Figure 8.
PAGE 8
Components selection 6.3 L6932H1.2 Component part list Table 6. Component par list Reference Part number Description Manufacturer C1 GRM32ER6C226KE20B 22Uf, 16V MURATA C2 GRM32ER6C226KE20B 22Uf, 16V MURATA R1 N.M. R2 0Ω R3 100K 7 Components selection 7.1 Input capacitor The input capacitor value depends on a lot of factors such as load transient requirements, input source (battery or DC/DC converter) and its distance from the input cap.
PAGE 9
L6932H1.2 7.3 Components selection Loop Stability The stability of the loop is affected by the zero introduced by the output capacitor. The time constant of the zero is given by: T = ESR × C OUT 1 F ZERP = ---------------------------------------------2π × ESR × C OUT This zero helps to increase the phase margin of the loop until the time constant is higher than some hundreds of nsec, depending also on the output voltage and current.
PAGE 10
Package mechanical data 8 L6932H1.2 Package mechanical data In order to meet environmental requirements, ST offers these devices in ECOPACK® packages. These packages have a Lead-free second level interconnect . The category of second level interconnect is marked on the package and on the inner box label, in compliance with JEDEC Standard JESD97. The maximum ratings related to soldering conditions are also marked on the inner box label. ECOPACK is an ST trademark.
PAGE 11
L6932H1.2 Package mechanical data Table 8. HSO-8 Mechanical data mm. inch Dim. Min Typ Max Min Typ Max A 1.35 1.75 0.053 0.069 A1 0.10 0.25 0.04 0.010 A2 1.10 1.65 0.043 0.065 B 0.33 0.51 0.013 0.020 C 0.19 0.25 0.007 0.010 D 4.80 5.00 0.189 0.197 D1 E 3.1 3.80 0.122 4.00 0.150 0.157 E1 2.4 0.094 e 1.27 0.050 H 5.80 6.20 0.228 0.244 h 0.25 0.50 0.010 0.020 L 0.40 1.27 0.016 0.050 k ddd 8° (max.) 0.1 0.04 Figure 10.
PAGE 12
Revision history 9 L6932H1.2 Revision history Table 9.
PAGE 13
L6932H1.2 Please Read Carefully: Information in this document is provided solely in connection with ST products. STMicroelectronics NV and its subsidiaries (“ST”) reserve the right to make changes, corrections, modifications or improvements, to this document, and the products and services described herein at any time, without notice. All ST products are sold pursuant to ST’s terms and conditions of sale.