1
EM MICROELECTRONIC-MARIN SA
A6150
High Efficiency Linear Power Supply with
Power Surveillance and Software Monitoring
Features
Highly accurate 5 V, 100 mA guaranteed output
Low dropout voltage, typically 380 mV at 100 mA
Low quiescent current, typically 175
A
Standby mode, maximum current 340
A (with
100
A load on OUTPUT)
Unregulated DC input can withstand 20 V reverse
battery and + 60 V power transients
Fully operational for unregulated DC input voltage
up to 26 V and regulated output voltage down to 3.0 V
Reset output guaranteed for regulated output voltage
down to 1.2 V
No reverse output current
Very low temperature coefficient for the regulated output
Current limiting
Comparator for voltage monitoring,voltage reference
1.52 V
Programmable reset voltage monitoring
Programmable power on reset (POR ) delay
Watchdog with programmable time windows guarant-
ees a minimum time and a maximum time between
software clearing of the watchdog
Time base accuracy
10%
System enable output offers added security
TTL/CMOS compatible
-40 to +85
C temperature range
On request extended temperature range,-40 to +125
C
DIP8 and SO8 packages
Description
The A6150 offers a high level of integration by combining
voltage regulation, voltage monitoring and software
monitoring in an 8 lead package. The voltage regulator
has a low dropout voltage (typ. 380 mV at 100 mA) and a
low quiescent current (175
A). The quiescent current
increases only slightly in dropout prolonging battery life.
Built-in protection includes a positive transient absorber for
up to 60 V (load dump) and the ability to survive an
unregulated input voltage of 20 V (reverse battery). The
input may be connected to ground or a reverse voltage
without reverse current flow from the output to the input. A
comparator monitors the voltage applied at the V
IN
input
comparing it with an internal 1.52 V reference. The power-
on reset function is initialized after V
IN
reaches 1.52 V and
takes the reset output inactive after T
POR
depending of
external resistance. The reset output goes active low when
the V
IN
voltage is less than 1.52 V. The RES and EN
outputs are guaranteed to be in a correct state for a
regulated output voltage as low as 1.2 V. The watchdog
function monitors software cycle time and execution. If
software clears the watchdog too quickly (incorrect
cycle time) or too slowly (incorrect execution) it will
cause the system to be reset. The system enable
output prevents critical control functions being
activated until software has successfully cleared the
watchdog three times. Such a security could be used
to prevent motor controls being energized on
repeated resets of a faulty system.
Applications
Automotive systems
Cellular telephones
Security systems
Battery powered products
High efficiency linear power supplies
Automotive electronics
Typical Operating Configuration
Pin Assignment
5 V
Fig. 1
GND
A6150
V
IN
TCL
RES
EN
R
V
SS
INPUT OUTPUT
Unregu-
lated
voltage
Version A0:
Version A1:
DIP8/ SO8
OUTPUT
Fig. 2
V
IN
R
INPUT
A6150
EN
RES
TCL
V
SS
2
A6150
Absolute Maximum Ratings
Parameter
Symbol
Conditions
Continuous voltage at INPUT
to V
SS
V
INPUT
-0.3 to + 30 V
Transients on INPUT for
t < 100 ms and duty cycle 1%
V
TRANS
up to + 60 V
Reverse supply voltage on INPUT
V
REV
- 20 V
Max. voltage at any signal pin
V
MAX
OUTPUT + 0.3 V
Min. voltage at any signal pin
V
MIN
V
SS
0.3 V
Storage temperature
T
STO
-65 to + 150 C
Electrostatic discharge max. to
MIL-STD-883C method 3015
V
Smax
1000 V
Max. soldering conditions
T
Smax
250 C x 10 s
Table 1
Stresses above these listed maximum ratings may cause
permanent damage to the device. Exposure be-
yond specified operating conditions may affect device
reliability or cause malfunction.
Handling Procedures
This device has built-in protection against high static
voltages or electric fields; however, anti-static precau-
tions must be taken as for any other CMOS component.
Unless otherwise specified, proper operation can only
occur when all terminal voltages are kept within the
supply voltage range. At any time, all inputs must be tied
to a defined logic voltage level.
Operating Conditions
Parameter
Symbol
Min. Typ. Max. Units
Operating junction
temperature
1)
T
J
-40
+125
C
INPUT voltage
2)
V
INPUT
2.3
26
V
OUTPUT voltage
2) 3)
V
OUTPUT
1.2
V
RES & EN guaranteed
4)
V
OUTPUT
1.2
V
OUTPUT current
5)
I
OUTPUT
100
mA
Comparator input
voltage
V
IN
0
V
OUTPUT
V
RC-oscillator
programming
R
10
1000
k
Thermal resistance from
junction to ambient
6)
-DIP8
R
th(j-a)
105
C/W
-SO8
R
th(j-a)
160
C/W
Table 2
1)
The maximum operating temperature is confirmed by
sampling at initial device qualification. In production, all
devices are tested at +85
C. On request devices tested at
+125
C can be supplied.
2)
Full operation quaranteed. To achieve the load regulation
specified in Table 3 a 22
F capacitor or greater is
required on the INPUT, see Fig. 18. The 22
F must have
an effective resistance
5
and a resonant frequency
above 500 kHz.
3)
A 10
F load capacitor and a 100 nF decoupling capacitor
are required on the regulator OUTPUT for stability. The
10
F must have an effective series resistance of
5
and
a resonant frequency above 500 kHz.
4)
RES and EN (EN only for version A0) must be pulled up
externally to V
OUTPUT
even if they are unused. (Note: RES
and EN are used as inputs by EM test).
5)
The OUTPUT current will not apply for all possible
combinations of input voltage and output current.
Combinations that would require the A6150 to work above
the maximum junction temperature (+125
C) must be
avoided.
6)
The thermal resistance specified assumes the package is
soldered to a PCB.
3
A6150
Electrical Characteristics
V
INPUT
= 6.0 V, C
L
= 10
F + 100 nF, C
INPUT
= 22
F, T
J
= -40 to +85
C, unless otherwise specified
Parameter
Symbol
Test Conditions
Min. Typ.
Max.
Unit
Supply current in standby mode I
SS
R
EXT
= don't care, TCL = V
OUTPUT
,
V
IN
= 0 V, I
L
= 100
A
340
A
Supply current
1)
I
SS
R
EXT
= 100 k
, I/P
S
at V
OUTPUT
,
O/P
S
1 M
to V
OUTPUT
, I
L
= 100
A
175
400
A
Supply current
1)
I
SS
R
EXT
= 100 k
, I/P
S
at V
OUTPUT
, V
INPUT
=
8.0 V, O/P
S
1 M
to V
OUTPUT
, I
L
= 100 mA
1.7
4.2
mA
Output voltage
V
OUTPUT
I
L
= 100
A
4.88
5.12
V
Output voltage
V
OUTPUT
100
A
I
L
100 mA,
-40
C
T
J
+125
C
4.85
5.15
V
Output voltage temperature
coefficient
2)
V
th(coeff)
50
180 ppm/
C
Line regulation
3)
V
LINE
6 V
V
INPUT
26 V, I
L
= 1 mA,
T
J
= +125
C
0.2
0.5
%
Load regulation
3)
V
L
100
A
I
L
100 mA
0.2
0.6
%
Dropout voltage
4)
V
DROPOUT
I
L
= 100
A
40
170
mV
Dropout voltage
4)
V
DROPOUT
I
L
= 100 mA
380
mV
Dropout voltage
4)
V
DROPOUT
I
L
= 100 mA, -40
C
T
J
+125
C
650
mV
Dropout supply current
I
SS
V
INPUT
= 4.5 V, I
L
= 100
A,
R
EXT
= 100 k
, O/P
S
1 M
to
V
OUTPUT
, I/P
S
at V
OUTPUT
1.2
1.6
mA
Thermal regulation
5)
V
thr
T
J
= +25
C, I
L
= 50 mA,
V
INPUT
= 26 V, T = 10 ms
0.05
0.25
%/W
Current limit
I
Lmax
OUTPUT tied to V
SS
450
mA
OUTPUT noise, 10Hz to 100kHz V
NOISE
200
Vrms
RES
&
EN
Output Low Voltage
V
OL
V
OUTPUT
= 4.5 V, I
OL
= 20 mA
0.4
V
V
OL
V
OUTPUT
= 4.5 V, I
OL
= 8 mA
0.2
0.4
V
V
OL
V
OUTPUT
= 2.0 V, I
OL
= 4 mA
0.2
0.4
V
V
OL
V
OUTPUT
= 1.2 V, I
OL
= 0.5 mA
0.06
0.2
V
EN (vers. A1)
Output High Voltage
V
OH
V
OUTPUT
= 4.5 V, I
OH
= -1 mA
3.5
4.1
V
V
OH
V
OUTPUT
= 2.0 V, I
OH
= -100
A
1.8
1.9
V
V
OH
V
OUTPUT
= 1.2 V, I
OH
= -30
A
1.0
1.1
V
TCL and V
IN
TCL Input Low Level
V
IL
V
SS
0.8
V
TCL Input High Level
V
IH
2.0
V
OUTPUT
V
Leakage current
I
LI
V
SS
V
TCL
V
OUTPUT
0.05
1
A
V
IN
input resistance
R
VIN
100
M
V
REF
T
J
= +25
C
1.474 1.52 1.566
V
Comparator reference
6)7)
V
REF
1.436
1.620
V
V
REF
-40
C
T
J
+125
C
1.420
1.620
V
Comparator hysteresis
7)
V
HY
2
mV
Table 3
1)
If INPUT is connected to V
SS
, no reverse current will flow from the OUTPUT to the INPUT, however the supply current specified will
be sank by the OUTPUT to supply the A6150.
2)
The OUTPUT voltage temperature coefficient is defined as the worst case voltage change divided by the total temperature range.
3)
Regulation is measured at constant junction temperature using pulse testing with a low duty cycle. Changes in OUTPUT voltage
due to heating effects are covered in the specification for thermal regulation.
4)
The dropout voltage is defined as the INPUT to OUTPUT differential, measured with the input voltage equal to 5.0 V.
5)
Thermal regulation is defined as the change in OUTPUT voltage at a time T after a change in power dissipation is applied,
excluding load or line regulation effects.
6)
The comparator and the voltage regulator have separate voltage references (see " Block Diagram" Fig. 7).
7)
The comparator reference is the power-down reset threshold. The power-on reset threshold equals the comparator reference
voltage plus the comparator hysteresis (see Fig. 4).
4
A6150
Timing Characteristics
V
INPUT
= 6.0 V, I
L
= 100
A, C
L
= 10
F + 100 nF, C
INPUT
= 22
F, T
J
= -40 to + 85
C, unless otherwise specified
Parameter
Symbol Test Conditions
Min.
Typ.
Max.
Units
Propagation delays:
TCL to Output Pins
T
DIDO
250
500
ns
V
IN
sensitivity
T
SEN
1
5
20
s
Logic Transition Times on all Output Pins
T
TR
Load 10 k
, 50 pF
30
100
ns
Power-on Reset delay
T
POR
R
EXT
= 123 k
1%
90
100
110
ms
Watchdog Time
T
WD
R
EXT
= 123 k
1%
90
100
110
ms
Open Window Percentage
OWP
0.2 T
WD
Closed Window Time
T
CW
0.8 T
WD
T
CW
R
EXT
= 123 k
1%
72
80
88
ms
Open Window Time
T
OW
0.4 T
WD
T
OW
R
EXT
= 123 k
1%
36
40
44
ms
Watchdog Reset Pulse
T
WDR
T
WD
/40
T
WDR
R
EXT
= 123 k
1%
2.5
ms
T
CL
Input Pulse Width
T
TCL
150
ns
Table 4
Timing Waveforms
Watchdog Timeout Period
Voltage Monitoring
T
WD
= T
POR
T
CW
closed window
T
OW
open window
Watchdog
timer reset
Condition:
R
EXT
= 123 k
- OWP
- 20%
+ OWP
+ 20%
80
100
120
Fig. 3
t [ms]
T
SEN
T
SEN
T
SEN
T
SEN
T
POR
T
POR
RES
V
IN
V
REF
V
HY
Conditions:
V
OUTPUT
3 V
No timeout
Fig. 4
5
A6150
Timer Reaction
Combined Voltage and Timer Reaction
Block Diagram
T
CW
+T
OW
T
OW
V
IN
V
REF
TCL
RES
EN
Condition:
V
OUTPUT
3 V
Fig. 6
- Watchdog timer reset
TCL
too early
3 correct TCL service
EN goes active low
1
2
3
T
POR
=T
WD
T
CW
Voltage
Regulator
Voltage
Reference
Voltage
Reference
INPUT
V
IN
R
OUTPUT
Enable
Logic
Reset
Control
Timer
V
REF
Comparator
TCL
Fig. 7
EN
RES
Current
Controlled
Oscillator
Open drain
output RES
Vers. A0
Vers. A1
Conditions: V
IN
> V
REF
after power-up sequence
T
CW
T
OW
T
CW
T
OW
T
CW
T
TCL
T
WDR
TCL
RES
EN
Fig.5
1
2
3
- Watchdog timer reset
T
CW
+T
OW
T
CW
+T
OW
T
CW
+T
OW
3 correct TCL services Timeout
EN goes active low
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