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
µ
A
Standby mode, maximum current 340
µ
A (with
100
µ
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
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
Version A0:
Version A1:
Unregu-
lated
voltage
INPUT OUTPUT
A6150
R
V
IN
TCL
RES
EN
5V
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
µ
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
V
SS
GND
Fig. 1
Typical Operating Configuration
Pin Assignment
DIP8/ SO8
EN
RES
TCL
V
SS
A6150
V
IN
R
OUTPUT
INPUT
Fig. 2
1
A6150
Absolute Maximum Ratings
Parameter
Continuous voltage at INPUT
to V
SS
Transients on INPUT for
t < 100 ms and duty cycle 1%
Reverse supply voltage on INPUT
Max. voltage at any signal pin
Min. voltage at any signal pin
Storage temperature
Electrostatic discharge max. to
MIL-STD-883C method 3015
Max. soldering conditions
Symbol
V
INPUT
V
TRANS
V
REV
V
MAX
V
MIN
T
STO
V
Smax
T
Smax
Conditions
-0.3 to + 30 V
up to + 60 V
- 20 V
OUTPUT + 0.3 V
V
SS
– 0.3 V
-65 to + 150
°C
1000 V
250
°C
x 10 s
Operating Conditions
Parameter
Operating junction
temperature
1)
INPUT voltage
2)
OUTPUT voltage
2) 3)
RES
&
EN guaranteed
4)
OUTPUT current
5)
Comparator input
voltage
RC-oscillator
programming
Thermal resistance from
junction to ambient
6)
-DIP8
-SO8
Symbol
T
J
V
INPUT
V
OUTPUT
V
OUTPUT
I
OUTPUT
V
IN
R
Min.
-40
2.3
1.2
1.2
Typ. Max.
+125
26
Units
°C
V
V
V
mA
V
kΩ
100
0
10
V
OUTPUT
1000
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.
R
th(j-a)
R
th(j-a)
105
160
°C/W
°C/W
Table 2
1)
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.
2)
3)
4)
5)
6)
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.
Full operation quaranteed. To achieve the load regulation
specified in Table 3 a 22
µ
F capacitor or greater is
required on the INPUT, see Fig. 18. The 22
µ
F must have
an effective resistance
≤
5
Ω
and a resonant frequency
above 500 kHz.
A 10
µ
F load capacitor and a 100 nF decoupling capacitor
are required on the regulator OUTPUT for stability. The
10
µ
F must have an effective series resistance of
≤
5
Ω
and
a resonant frequency above 500 kHz.
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).
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.
The thermal resistance specified assumes the package is
soldered to a PCB.
2
A6150
Electrical Characteristics
V
INPUT
= 6.0 V, C
L
= 10
µ
F + 100 nF, C
INPUT
= 22
µ
F, T
J
= -40 to +85
°
C, unless otherwise specified
Parameter
Symbol
Test Conditions
R
EXT
= don’t care, TCL = V
OUTPUT
,
V
IN
= 0 V, I
L
= 100
µ
A
R
EXT
= 100 k
Ω
, I/P
S
at V
OUTPUT
,
O/P
S
1 M
Ω
to V
OUTPUT
, I
L
= 100
µ
A
R
EXT
= 100 k
Ω
, I/P
S
at V
OUTPUT
, V
INPUT
=
8.0 V, O/P
S
1 M
Ω
to V
OUTPUT
, I
L
= 100 mA
I
L
= 100
µ
A
100
µ
A
≤
I
L
≤
100 mA,
-40
°
C
≤
T
J
≤
+125
°
C
6 V
≤
V
INPUT
≤
26 V, I
L
= 1 mA,
T
J
= +125
°
C
100
µ
A
≤
I
L
≤
100 mA
I
L
= 100
µ
A
I
L
= 100 mA
I
L
= 100 mA, -40
°
C
≤
T
J
≤
+125
°
C
V
INPUT
= 4.5 V, I
L
= 100
µ
A,
R
EXT
= 100 k
Ω
, O/P
S
1 M
Ω
to
V
OUTPUT
, I/P
S
at V
OUTPUT
T
J
= +25
°
C, I
L
= 50 mA,
V
INPUT
= 26 V, T = 10 ms
OUTPUT tied to V
SS
V
OUTPUT
= 4.5 V, I
OL
= 20 mA
V
OUTPUT
= 4.5 V, I
OL
= 8 mA
V
OUTPUT
= 2.0 V, I
OL
= 4 mA
V
OUTPUT
= 1.2 V, I
OL
= 0.5 mA
V
OUTPUT
= 4.5 V, I
OH
= -1 mA
V
OUTPUT
= 2.0 V, I
OH
= -100
µ
A
V
OUTPUT
= 1.2 V, I
OH
= -30
µ
A
Min. Typ.
Max.
340
Unit
µ
A
µ
A
Supply current in standby mode I
SS
Supply current
Supply current
Output voltage
Output voltage
Output voltage temperature
coefficient
2)
Line regulation
3)
Load regulation
3)
Dropout voltage
4)
Dropout voltage
4)
Dropout voltage
4)
Dropout supply current
Thermal regulation
5)
1)
I
SS
I
SS
V
OUTPUT
V
OUTPUT
V
th(coeff)
V
LINE
V
L
V
DROPOUT
V
DROPOUT
V
DROPOUT
I
SS
V
thr
1)
175
4.88
4.85
50
0.2
0.2
40
380
1.7
400
4.2
5.12
5.15
180
0.5
0.6
170
650
1.6
0.25
mA
V
V
ppm/
°
C
%
%
mV
mV
mV
mA
%/W
mA
µ
Vrms
V
V
V
V
V
V
V
V
V
µ
A
M
Ω
V
V
V
mV
Table 3
1.2
0.05
450
200
0.4
0.2
0.2
0.06
3.5
1.8
1.0
V
SS
2.0
4.1
1.9
1.1
Current limit
I
Lmax
OUTPUT noise, 10Hz to 100kHz V
NOISE
RES
&
EN
Output Low Voltage
V
OL
V
OL
V
OL
V
OL
EN
(vers. A1)
Output High Voltage
V
OH
V
OH
V
OH
TCL and V
IN
TCL Input Low Level
V
IL
TCL Input High Level
V
IH
Leakage current
I
LI
V
IN
input resistance
R
VIN
V
REF
6)7)
Comparator reference
V
REF
V
REF
7)
Comparator hysteresis
V
HY
1)
0.4
0.4
0.2
V
SS
≤
V
TCL
≤
V
OUTPUT
T
J
= +25
°
C
-40
°
C
≤
T
J
≤
+125
°
C
0.8
V
OUTPUT
0.05
1
100
1.474 1.52 1.566
1.436
1.620
1.420
1.620
2
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).
3
A6150
Timing Characteristics
V
INPUT
= 6.0 V, I
L
= 100
µ
A, C
L
= 10
µ
F + 100 nF, C
INPUT
= 22
µ
F, T
J
= -40 to + 85
°
C, unless otherwise specified
Parameter
Propagation delays:
TCL to Output Pins
V
IN
sensitivity
Logic Transition Times on all Output Pins
Power-on Reset delay
Watchdog Time
Open Window Percentage
Closed Window Time
Open Window Time
Watchdog Reset Pulse
T
CL
Input Pulse Width
Symbol Test Conditions
T
DIDO
T
SEN
T
TR
T
POR
T
WD
OWP
T
CW
T
CW
T
OW
T
OW
T
WDR
T
WDR
T
TCL
Min.
Typ.
250
5
30
100
100
±
0.2 T
WD
0.8 T
WD
80
0.4 T
WD
40
T
WD
/40
2.5
Max.
500
20
100
110
110
88
44
Units
ns
µ
s
ns
ms
ms
ms
ms
ms
ns
Table 4
Load 10 k
Ω
, 50 pF
R
EXT
= 123 k
Ω ±
1%
R
EXT
= 123 k
Ω ±
1%
R
EXT
= 123 k
Ω ±
1%
R
EXT
= 123 k
Ω ±
1%
R
EXT
= 123 k
Ω ±
1%
1
90
90
72
36
150
Timing Waveforms
Watchdog Timeout Period
T
WD
= T
POR
−
OWP
−
20%
+ OWP
+ 20%
Condition:
R
EXT
= 123 k
Ω
Watchdog
timer reset
T
CW
– closed window
T
OW
– open window
t [ms]
80
100
120
Fig. 3
Voltage Monitoring
V
IN
V
HY
Conditions:
V
OUTPUT
≥
3 V
No timeout
T
SEN
V
REF
T
SEN
T
SEN
T
SEN
T
POR
RES
T
POR
Fig. 4
4
A6150
Timer Reaction
T
OW
Conditions: V
IN
> V
REF
after power-up sequence
T
CW
T
CW
+T
OW
T
CW
+T
OW
T
TCL
T
WDR
1
2
3
T
CW
TCL
RES
EN
T
OW
T
CW
T
CW
+T
OW
3 correct TCL services
EN goes active low
- Watchdog timer reset
Timeout
Fig.5
Combined Voltage and Timer Reaction
Condition:
V
OUTPUT
≥
3 V
V
IN
V
REF
T
POR
=T
WD
TCL
T
OW
T
CW
T
CW
+T
OW
RES
EN
TCL
too early
1
2
3
- Watchdog timer reset
3 correct TCL service
EN goes active low
Fig. 6
Block Diagram
INPUT
Voltage
Regulator
Voltage
Reference
Voltage
Reference
Enable
Logic
OUTPUT
EN
Vers. A0
V
REF
Comparator
Reset
Control
Vers. A1
RES
V
IN
Open drain
output RES
Timer
R
Current
Controlled
Oscillator
TCL
Fig. 7
5
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