L6932
HIGH PERFORMANCE 2A ULDO LINEAR REGULATOR
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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
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)
APPLICATIONS
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MOTHERBOARDS
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MOBILE PC
HAND-HELD INSTRUMENTS
PCMCIA CARDS
PROCESSORS I/O
CHIPSET AND RAM SUPPLY
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.
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
TYPICAL OPERATING CIRCUIT
V
IN
2V to 14V
IN
2
3
OUT
V
OUT
1.5V-1.8V-2.5V
L6932D
C1
5,6,7,8
GND
EN
1
4
PGOOD
C2
V
IN
2V to 14V
IN
2
4
OUT
R1
V
OUT
1.2V to 5V
L6932D
C1
5,6,7,8
GND
EN
1
3
ADJ
C2
R2
December 2005
Rev. 9
1/11
L6932
PIN CONNECTIONS
EN
IN
ADJ
OUT
1
2
3
4
8
7
6
5
GND
GND
GND
GND
EN
IN
OUT
PGOOD
1
2
3
4
8
7
6
5
GND
GND
GND
GND
L6932D1.2
L6932D1.5
L6932D1.8
L6932D2.5
PIN FUNCTION
N°
L6232D
1.2
L6232D
1.5/1.8/
2.5
Description
1
2
ADJ
3
–
OUT
4
–
5, 6, 7, 8
EN
IN
–
OUT
–
Enables the device if connected to Vin and disables the device if forced to gnd.
Supply voltage. This pin is connected to the drain of the internal N-mos. Connect this
pin to a capacitor larger than 10
µ
F.
Connecting this pin to a voltage divider it is possible to programme the output voltage
between 1.2V and 5V.
Regulated output voltage. This pin is connected to the source of the internal N-mos.
Connect this pin to a capacitor of 10
µ
F.
Regulated output voltage. This pin is connected to the source of the internal N-mos.
Connect this pin to a capacitor of 10
µ
F.
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.
GND
Ground pin.
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
in
VIN and Pgood
EN, OUT and ADJ
14.5
-0.3 to (V
in
+0.3)
V
V
THERMAL DATA
Symbol
Parameter
Value
Unit
R
th J-amb
T
max
Thermal Resistance Junction to Ambient
Maximum Junction Temperature
Storage Temperature Range
62 (*)
150
-65 to 150
°C/W
°C
°C
T
stg
(*) Measured on Demoboard with about 4 cm
2
of dissipating area 2 Oz.
2/11
L6932
BLOCK DIAGRAM
(Referred to the Fixed Voltage version)
IN
CHARGE
PUMP
VREF
REFERENCE
VREF=1.25V
DRIVER
CURRENT
LIMIT
+
-
ERROR
AMPL.
OUT
EN
ENABLE
THERMAL
SENSOR
-
0.9 VREF
+
PG
GND
D99IN1100
ELECTRICAL CHARACTERISTCS
(T
j
= 25°C, V
IN
= 5V unless otherwise specified)
(*) Specification referred to T
j
from -25°C to 125°C.
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
V
in
V
o
Operating Supply Voltage
Output voltage L6932D1.2
Output voltage L6932D1.5
Output voltage L6932D1.8
Output voltage L6932D2.5
L6932D1.2
Line Regulation
I
o
= 0.1A; V
in
= 3.3V
I
o
= 0.1A; V
in
= 3.3V
I
o
= 0.1A; V
in
= 3.3V
I
o
= 0.1A; V
in
= 3.3V
V
in
= 2.5V ±10%; I
o
= 10mA
V
in
= 3.3V ±10%; I
o
= 10mA
V
in
= 5V ±10%;
L6932D1.5
Line Regulation
I
o
= 10mA
V
in
= 2.5V ±10%; I
o
= 10mA
V
in
= 3.3V ±10%; I
o
= 10mA
V
in
= 5V ±10%;
L6932D1.8
Line Regulation
I
o
= 10mA
V
in
= 2.5V ±10%; I
o
= 10mA
V
in
= 3.3V ±10%; I
o
= 10mA
V
in
= 5V ±10%;
L6932D2.5
Line Regulation
L6932D1.2 Load Regulation
L6932D1.5 Load Regulation
L6932D1.8 Load Regulation
L6932D2.5 Load Regulation
V
in
= 5V ±10%;
I
o
= 10mA
I
o
= 10mA
V
in
= 3.3V ±10%; I
o
= 10mA
V
in
= 3.3V; 0.1A < I
o
< 2A
V
in
= 3.3V; 0.1A < I
o
< 2A
V
in
= 3.3V; 0.1A < I
o
< 2A
V
in
= 3.3V; 0.1A < I
o
< 2A
2
1.188
1.485
1.782
2.475
1.2
1.5
1.8
2.5
14
1.212
1.515
1.818
2.525
5
5
5
5
5
5
5
5
5
5
5
15
15
15
15
200
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
m
Ω
R
dson
Drain Source ON resistance
3/11
L6932
ELECTRICAL CHARACTERISTCS
(continued)
Symbol
Parameter
Test Condition
Min.
Typ.
Max.
Unit
I
occ
I
q
I
sh
Current limiting
Quiescent current
Shutdown current
Ripple Rejection
2V < V
in
< 14V
f = 120Hz, I
o
= 1A
V
in
= 5V,
∆
V
in
= 2Vpp
V
o
rise
I
pgood
=1mA
*
2.3
2.5
0.2
2.7
0.4
25
A
mA
µ
A
60
0.5
75
0.65
90
10
0.2
0.4
0.8
dB
V
%Vo
%Vo
V
V
en
EN Input Threshold
Pgood threshold
Pgood Hysteresis
Pgood saturation
Figure 1. Output Voltage vs. Junction
Temperature (L6932D1.2)
1.213
1.212
Figure 3. Output Voltage vs. Junction
Temperature (L6932D2.5)
2.520
2.515
1.212
1.211
V
1.211
2.510
V
2.505
1.210
1.210
1.209
-60
-40
-20
0
20
40
60
80
100 120 140 160
Temp [°C]
2.500
2.495
-60 -40
-20
0
20
40
60
80
100 120 140 160
Temp [°C]
Figure 2. Output Voltage vs. Junction
Temperature (L6932D1.8)
1.808
Figure 4. Quiescent Current vs. Junction
Temperature
310
300
Vin=5V
290
1.804
1.800
V
Iq 280
1.796
(uA)
270
1.792
260
1.788
-60 -40 -20
0
20
40 60 80
Temp [°C]
100 120 140 160
250
-40
-20
0
20
40
60
Temp [°C ]
80
100
120
140
4/11
L6932
Figure 5. Shutdown Current vs. Junction TemperatureAPPLICATION INFORMATIONS
7.5
7
6.5
Ishdn
(uA)
5.5
5
4.5
4
Vin=5V
6
-40
-20
0
20
40
Temp [°C ]
60
80
100
120
140
APPLICATION CIRCUIT
In figure 6 the schematic circuit of the demoboards are shown.
Figure 6. Demoboards Schematic Circuit
V
IN
V
OUT
IN
EN
C1
OUT
2
1
5
GND
L6932D1.5
L6932D1.8
L6932D2.5
6
7
8
3
4
PGOOD
C2
V
IN
IN
EN
C1
2
1
5
GND
4
OUT
R1
V
OUT
1.2V to 5V
L6932D1.2
3
6
7
8
ADJ
C2
R2
V
OUT
=
1.2
×
(R1
+
R2)
R2
COMPONENT LIST
Fixed version
Reference
Part Number
Description
Manufacturer
C1
C2
C34Y5U1E106Z
C34Y5U1E106Z
10uF, 25V
10uF, 25V
TOKIN
TOKIN
5/11
电源技术
