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
1.8V 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)
L6932D1.8 (SO-8) L6932D1.8TR (T&R)
L6932D2.5 (SO-8) L6932D2.5TR (T&R)
APPLICATIONS
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MOTHERBOARDS
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Mosfet, can be usefull for the DC-DC conversion be-
tween 2.5V and 1.8V at 2A in portable applications
reducing the power dissipation.
L6932 is available in 1.8V, 2.5V and adj version from
1.2V and ensure a voltage regulation accuracy of
1%.
The 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 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.
MOBILE PC
HAND-HELD INSTRUMENTS
PCMCIA CARDS
PROCESSORS I/O
CHIPSET AND RAM SUPPLY
DESCRIPTION
The L6932 Ultra Low Drop Output linear regulator op-
erates from 2V to 14V and is able to support 2A. De-
signed with an internal 50mΩ N-channel
TYPICAL OPERATING CIRCUIT
IN
VIN
2V to 14V
2
OUT
3
L6932D
PGOOD
4
C1
5,6,7,8
GND
EN
1
VOUT
1.8V or 2.5V
C2
IN
VIN
2V to 14V
2
4
OUT
L6932D1.2
ADJ
3
C1
5,6,7,8
GND
EN
1
VOUT
1.2V to 5V
R1
C2
R2
February 2003
1/10
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
L6932D1.8
L6932D2.5
PIN FUNCTION
N°
1
2
ADJ
3
–
OUT
4
–
5, 6, 7, 8
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.
OUT
–
Regulated output voltage. This pin is connected to the source of the internal N-mos.
Connect this pin to a capacitor of 10µF.
Regulated output voltage. This pin is connected to the source of the internal N-mos.
Connect this pin to a capacitor of 10µF.
L6232D
1.2
L6232D
1.8/2.5
Description
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 10µF.
–
Connecting this pin to a voltage divider it is possible to programme the output voltage
between 1.2V and 5V.
EN
IN
ABSOLUTE MAXIMUM RATINGS
Symbol
V
in
VIN and Pgood
EN, OUT and ADJ
Parameter
Value
14.5
-0.3 to (V
in
+0.3)
Unit
V
V
THERMAL DATA
Symbol
R
th J-amb
T
max
Parameter
Thermal Resistance Junction to Ambient
Maximum Junction Temperature
Storage Temperature Range
Value
62 (*)
150
-65 to 150
Unit
°C/W
°C
°C
T
stg
(*) Measured on Demoboard with about 4 cm
2
of dissipating area 2 Oz.
2/10
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
V
in
V
o
Parameter
Operating Supply Voltage
Output voltage L6932D1.2
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
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
L6932D1.8 Load Regulation
L6932D2.5 Load Regulation
R
dson
I
occ
I
q
I
sh
Drain Source ON resistance
Current limiting
Quiescent current
Shutdown current
Ripple Rejection
V
en
EN Input Threshold
2V < V
in
< 14V
f = 120Hz, I
o
= 1A
V
in
= 5V,
∆V
in
= 2Vpp
*
60
0.5
75
0.65
0.8
2.3
2.5
0.2
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
Test Condition
Min.
2
1.188
1.782
2.475
1.2
1.8
2.5
Typ.
Max.
14
1.212
1.818
2.525
5
5
5
5
5
5
5
5
15
15
15
200
2.7
0.4
25
Unit
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mΩ
A
mA
µA
dB
V
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L6932
ELECTRICAL CHARACTERISTCS
(continued)
Symbol
Parameter
Pgood threshold
Pgood Hysteresis
Pgood saturation
I
pgood
=1mA
V
o
rise
Test Condition
Min.
Typ.
90
10
0.2
0.4
Max.
Unit
%Vo
%Vo
V
Figure 1. Output Voltage vs. Junction
Temperature (L6932D1.2)
1.213
1.212
Figure 4. Quiescent Current vs. Junction
Temperature
310
300
1.212
290
Vin=5V
1.211
V
1.211
1.210
1.210
1.209
-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
Iq 280
(uA)
270
260
Figure 2. Output Voltage vs. Junction
Temperature (L6932D1.8)
1.808
Figure 5. Shutdown Current vs. Junction
Temperature
7.5
1.804
7
6.5
1.800
V
Ishdn
(uA)
6
5.5
5
4.5
Vin=5V
1.796
1.792
1.788
-60 -40 -20
0
20
40 60 80
Temp [°C]
100 120 140 160
4
-40
-20
0
20
40
Temp [°C ]
60
80
100
120
140
Figure 3. Output Voltage vs. Junction
Temperature (L6932D2.5)
2.520
2.515
2.510
V
2.505
2.500
2.495
-60
-40
-20
0
20
40
60
80
100 120 140 160
Temp [°C]
4/10
L6932
APPLICATION INFORMATIONS
APPLICATION CIRCUIT
In figure 6 the schematic circuit of the demoboards are shown.
Figure 6. Demoboards Schematic Circuit
VIN
IN
OUT
VOUT=2.5V/1.8V
2
L6932D2.5
L6932D1.8
6
GND
3
EN
C1
1
5
7
4
8
PGOOD
C2
VIN
IN
OUT
VOUT=1.2V TO 5V
2
L6932D1.2
EN
C1
4
R1
ADJ
1
5
GND
6
7
3
8
R2
C2
1.2
-
V
OUT
= -------
⋅ (
R1
+
R 2
)
R2
COMPONENT LIST
Fixed version
Reference
C1
C2
Part Number
C34Y5U1E106Z
C34Y5U1E106Z
Description
10uF, 25V
10uF, 25V
Manufacturer
TOKIN
TOKIN
Figure 7. Demoboard Layout (Fixed Version)
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