®
Preliminary
SPX2969
150mA Low Dropout Voltage Regulator
FEATURES
■
5V Fixed Output
■
150mA current capability
■
250mV Dropout
■
Programmable Reset Threshold
■
250µA Quiescent Current
■
Over Temperature Protection
■
Reverse Polarity Protection
■
Integrated Pull Up Resistor on Logic Outputs
■
-40° to +125°C Operating Range
I
SI
1
8
Q
2
SPX2969
8 Pin NSOIC
7
SO
RADJ
3
6
5
RO
GND
D
4
Available in Lead Free Packaging
APPLICATIONS
■
Automotive
■
Industrial
■
Wireless Base Station
DESCRIPTION
The SPX2969 is a low dropout linear regulator with integrated PNP pass transistor. This part is
designed for high voltage applications, which can withstand up to 45V and 125°C. The output
voltage is set at a fixed 5V, and the part is guaranteed to deliver at least 150mA. The SPX2969
provides multiple protection mechanisms, including over-temperature and over-current detec-
tion. The part has a built-in reset circuit to monitor when the output voltage is below 4.65V. The
reset voltage threshold can be programmed down to 3.5V using an external resistor voltage
divider, while the reset timing can be programmed via an external capacitor. A built in comparator
compares the signal at the pin SI, normally fed by a voltage divider from the input voltage, with
the reference and gives an early warning on the pin SO. Both the sense output and the reset
output delay signals contain integrated 20kΩ pull up resistors. The part is available in an 8 Pin
NSOIC package.
TYPICAL APPLICATION CIRCUIT
12V
+
1000
µF
RS1
RESET
OUT
RO
SO
SI
D
GND
I
Q
5V
RADJ1
+
22µF
SPX2969
®
RADJ
RADJ2
RS2
0.1µF
Date: 10/4/05
SPX2969 150mA Low Dropout Voltage Regulator
© Copyright 2005 Sipex Corporation
1
ABSOLUTE MAXIMUM RATINGS
Input Voltage ...................................................................... -40V to 45V
Input Current ............................................................... internally limited
Sense Input Voltage ........................................................... -40V to 45V
Sense Input Current ......................................................... -1mA to 1mA
Reset Threshold Voltage ....................................................... -0.3 to 7V
Reset Threshold Current ................................................... -10 to 10mA
Reset Delay Voltage ............................................................. -0.3 to 7V
Reset Delay Current .................................................... internally limited
Ground Current .................................................................. 50mA (min)
Reset Output Voltage ............................................................ -0.3 to 7V
Reset Output Current .................................................. internally limited
Sense Output Voltage ........................................................... -0.3 to 7V
Sense Output Current ................................................. internally limited
Output Voltage ...................................................................... -0.3 to 7V
Output Current ............................................................ internally limited
Thermal Data
Junction to Ambient (8 Pin NSOIC) ......................................... 163°C/W
Junction to Pin 4, all GND Pins grounded ................................. 30°C/W
Storage Temperature .................................................. -50°C to +150°C
Junction Temperature. (Note 1).....................................-40°C to +150°C
These are stress ratings only and functional operation of the device at
these ratings or any other above those indicated in the operation sections
of the specifications below is not implied. Exposure to absolute maximum
rating conditions for extended periods of time may affect reliability.
ELECTRICAL CHARACTERISTICS
V
IN
= 13.5V; -40°C < T
J
< 125°C.
The
♦
denotes the specifications which apply over the full operating temperature range,
unless otherwise specified.
PARAMETER
Output Voltage
Current Limit
Current Consumption
I
q
= I
I
- I
Q
Current Consumption
I
q
= I
I
- I
Q
Current Consumption
I
q
= I
I
- I
Q
Dropout Voltage
Load Regulation
Line Regulation
Reset Generator
Threshold Voltage
Reset Adjust
Reset Pullup
Saturation Voltage
SYMBOL
V
Q
I
Q
I
q
I
q
I
q
V
DR
V
Q
V
Q
MIN
4.90
150
-
-
TYP
5.00
250
240
250
MAX
5.10
500
300
700
UNITS
V
mA
µA
µA
♦
♦
CONDITIONS
1mA < I
Q
100mA
6V < V
I
< 16V
I
Q
< 1 mA, Tj < 85°C
♦
I
Q
= 10mA
-
2
8
mA
♦
I
Q
= 50mA
I
Q
= 100mA (Q - I) when output
drops below 2% (see note 2)
-
-
-
0.25
2
1
0.5
20
10
V
mV
mV
♦
♦
I
Q
= 5mA to 100mA
♦
V
I
= 6V to 26V
I
Q
= 1 mA
V
RT
V
RADJ, TH
-
V
RO, SAT
4.50
1.26
10
-
4.65
1.35
20
0.1
4.80
1.44
40
0.4
V
V
KΩ
V
♦
♦
♦
♦
R
intern
V
Q
= 3.5V (see note 3)
Note 1:
Specifications in the -40°C to 150°C range are guaranteed by design, not production tested.
Note 2:
Dropout voltage = V
I
- V
Q
measured when the output voltage has dropped 100mV from the nominal value obtained at 13.5V input.
Note 3:
The reset threshold V
RT
can be decreased via an external voltage divider connected to the RADJ. In this case the reset condition is reached if
V
Q
< V
RT
and V
RADJ
< V
RADJ, TH
. Dimensioning the voltage divider according to: V
THRES
= V
RADJ, TH
X (R
ADJ1
+R
ADJ2
)/R
ADJ2.
Date: 10/4/05
SPX2969 150mA Low Dropout Voltage Regulator
© Copyright 2005 Sipex Corporation
2
ELECTRICAL CHARACTERISTICS
V
IN
= 13.5V; -40°C < T
J
< 125°C.
The
♦
denotes the specifications which apply over the full operating temperature range,
unless otherwise specified.
PARAMETER
Reset Generator
Upper Delay Switching Threshold
Lower Delay Switching Threshold
Saturation Voltage Delay
Capacitor
Charge Current
Delay Time L to H
Delay Time H to L
Input Voltage Sense
Sense Threshold High
Sense Threshold Low
Sense Output low Voltage
Sense Pull up
Sense Input Current
Sense Response Time
SYMBOL
MIN
TYP
MAX
UNITS
CONDITIONS
V
UD
V
LD
V
D, SAT
I
D
t
D
t
t
1.4
0.3
-
3.0
17
-
1.8
0.45
-
6.5
28
1
2.2
0.60
0.1
9.5
-
-
V
V
V
µA
ms
µs
♦
♦
♦
♦
♦
♦
V
Q
< V
RT
V
D
=1V
C
D
= 100nF
C
D
= 100nF
V
SI, high
V
SI, low
V
SO, low
-
i
si
-
1.25
1.18
-
10
-1
1.33
1.22
0.1
20
0.1
2
1.36
1.28
0.4
40
1
V
V
V
K
µA
µs
♦
♦
♦
♦
♦
♦
V
SI
< 1.20V
V
Q
> 3V R
intern
Date: 10/4/05
SPX2969 150mA Low Dropout Voltage Regulator
© Copyright 2005 Sipex Corporation
3
APPLICATIONS INFORMATION
The input capacitor C
I
is necessary for compensating line influences. Using a resistor of
approximately 1Ω in series with C
I
, the oscillating circuit consisting of input inductance and input
capacitance can be damped. The output capacitor C
Q
is necessary for the stability of the
regulating circuit. Stability is guaranteed at values
≥
10µF and at an ESR
≤
10Ω within the
operating temperature range. The delay pin capacitor's variation and temperature coefficient
may cause a small difference in the reset delay.
BLOCK DIAGRAM
I
ERROR AMPLIFIER
REFERENCE
CURRENT AND
SATURATION
CONTROL
20KΩ
20KΩ
Q
TRIMMING
D
RO
&
RADJ
SI
REFERENCE
SO
Date: 10/4/05
SPX2969 150mA Low Dropout Voltage Regulator
© Copyright 2005 Sipex Corporation
4
RESET TIMING DIAGRAM
VI
VQ
<t rr
t
V Q, rt
VD
V
V
UD
LD
V RO
td
I
dV
= D
CD
dt
t
t
RR
t
V RO,SAT
Power on
Reset
Thermal
Shutdown
Voltage Dip
at Input
Undervoltage
Secondary Overload
Spike
at Output
t
PIN DESCRIPTION
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
V
IN
SENSE IN
R
ADJ
DELAY
GND
RESET
SENSE OUT
V
OUT
DESCRIPTION (8 PIN NSOIC)
Input. Decouple to GND with a Ceramic capacitor.
Sense Input. If not needed, connect to Q.
Reset Threshold Adj. If not needed, connect to GND.
Reset Delay. To select delay time, connect to GND via capacitor.
Ground
Reset Output. The open-collector output is internally linked to Q
via a resistor. Leave open if not needed.
Sense Output. The open-collector output is internally linked to Q
via a resistor. Leave open if not needed.
5V Output. Connect to GND with a 10µF capacitor, ESR<10.
Date: 10/4/05
SPX2969 150mA Low Dropout Voltage Regulator
© Copyright 2005 Sipex Corporation
5
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