Philips Semiconductors
Product data
Micropower 150 mA, low-noise, low dropout linear
regulator with on/off
SA57031-XX
GENERAL DESCRIPTION
The SA57031 is a 150 mA, fixed output voltage regulator designed
to provide very low dropout voltage and low noise in battery
powered and portable applications. The output voltage is preset to
voltages between 1.8 to 5.0 Volts, in 100 mV increments.
The SA57031 achieves excellent performance in all specifications
such as excellent power supply ripple rejection at low frequency, low
supply-current, low dropout voltage, low power consumption,
extremely small size with chip scaled package (CSP), extremely low
output noise voltage, very fast start-up response time, precision
output, fast dynamic response to line and load regulation, etc. This
regulator consists of an internal voltage reference, and current limit.
The SA57031 is housed in a WL-CSP4 package (see dimensional
drawing for layout).
Bottom View
FEATURES
•
Many Preset Output Voltages: 1.8 to 5.0 V in 0.1 V increments
•
Wafer-level chip scale package (WL-CSP4)
•
Extremely low PSRR: 80 dB typical at 1 kHz
•
Low Dropout Voltage: 100 mV (typ) @ 50 mA output current
•
Very Low Consumption Current: 100 mA typ. (when not loaded),
0.1 mA max. (when off)
•
Low Temperature Drift Co-efficient to V
O
:
±100
ppm/°C
•
Built-in Current Limiter
•
Wide Operating Temperature Range: –40 to +85
°C
APPLICATIONS
•
High precision Output Voltage:
±2%
•
Output Current Capacity: 150 mA (typ)
•
Low Noise: 30mVrms @ 10 Hz to 100 kHz
•
Good Line Regulation: 0.01%/V typ.
•
Good Load Regulation: 0.003%/mA typ.
SIMPLIFIED SYSTEM DIAGRAM (BOTTOM VIEW)
ON
OFF
A2
B2
•
Cellular Phones, Cordless Phones and 2-way Radios
•
Electronic Notebooks, PDAs and Palmtop Computers
•
Cameras, VCRs and Camcorders
•
PCMCIA Cards
•
Modems
•
Battery-powered or Hand-held Instruments
V
I
C
I
SA57031-XX
GND
A1
V
O
B1
2.2
µF
+
–
DC
2.0 V TO 6.0 V
R
LOAD
C
O
V
Preset output voltages:
1.8 V to 5.0 V
(in 100 mV increments)
SL02001
Figure 1. Simplified system diagram.
2003 Jun 23
2
853-2361 28634
Philips Semiconductors
Product data
Micropower 150 mA, low-noise, low dropout linear
regulator with on/off
SA57031-XX
ORDERING INFORMATION
PACKAGE
TYPE NUMBER
SA57031-XXUK
NAME
WL–CSP4
DESCRIPTION
wafer level, chip-scale package; 4 bumps
TEMPERATURE
RANGE
–40 to +85
°C
NOTE:
The device has five voltage output options, indicated by the
XX
on
the Type Number. Other voltages, between 2.5 to 5.0 V in 100 mV
increments, are available on request.
XX
18
24
28
VOLTAGE (Typical)
1.8 V
2.4 V
2.8 V
PIN DESCRIPTION
PIN
A1
B1
B2
A2
SYMBOL
GND
V
O
V
I
ON/OFF
Device ground
Voltage output
Voltage input
Control pin. Connect to V
I
if not used.
DESCRIPTION
PIN CONFIGURATION (TOP VIEW)
ON/OFF
A2
B2
V
I
SA57031-XX
GND
A1
B1
V
O
SA00633
Figure 2. Pin configuration.
MAXIMUM RATINGS
Symbol
T
stg
T
oper
V
I
I
O
P
Storage temperature range
Operating Temperature Range
Supply voltage
Output Current
Power dissipation
Parameter
Min
–40
–40
–0.3
Max
+150
+85
+7
200
190
Unit
°C
°C
V
mA
mW
–
–
2003 Jun 23
3
Philips Semiconductors
Product data
Micropower 150 mA, low-noise, low dropout linear
regulator with on/off
SA57031-XX
CHARACTERISTICS
T
amb
= 25
°C;
V
I
= V
O
(nom)
+1 V; V
ON/OFF
= 2 V; I
O
= 1 mA unless otherwise specified.
SYMBOL
I
CC
PARAMETER
No-load input current
I
O
= 0 mA
I
O
= 50 mA
I
O
= 150 mA
I
CC
(OFF)
I
q
∆V
LNR
Input current (off)
Quiescent Current
Line regulation
V
ON/OFF
= 0.25 V
I
O
= 0 to 150 mA
V
I
= V
O
+0.5 V to 6 V
I
O
= 1 to 50 mA
∆V
LDR
Load regulation
I
O
= 1 to 100 mA
I
O
= 1 to 150 mA
∆V
O
/∆T
V
O
Temperature coefficient
T
j
= –30 to +85
°C
f = 1 kHz; I
O
= 1 mA; V
ripple
= 0.5 V;
V
O
= 1.8 to 4.0 V
f = 1 kHz; I
O
= 1 mA; V
ripple
= 0.5 V;
V
O
= 4.1 to 5.0 V
Vn
I
ON/OFF
V
ON/OFF(H)
V
ON/OFF(L)
R
ON/OFF
V
O
V
dropout
Output noise voltage
Output short-circuit current
ON/OFF HIGH threshold
voltage
ON/OFF LOW threshold voltage
ON/OFF Pull-down resistance
Output voltage (nominal)
Dropout voltage
V
O
= 2.0 to 2.3
V
O
= 2.4 to 2.7
V
O
= 2.8 to 5.0
f
BW
= 20 to 80 kHz; C
O
= 2.2
µF
V
I
= V
O
+1 V ; V
O
= 0 V
CONDITIONS
MIN.
TYP.
45
55
60
0.1
100
5
10
20
30
MAX.
100
–
–
1
190
10
25
50
70
mV
µA
µA
mV
UNIT
µA
–
–
–
–
–
–
–
–
–
–
–
–
–
–
1.5
0
2.5
x0.98
–
–
–
–
80
70
30
30
ppm/°C
–
dB
PSRR
Power supply ripple rejection
–
–
–
V
I
0.25
15
x1.02
0.35
0.29
0.26
µVrms
mA
V
V
MΩ
V
V
–
–
5
nom
0.25
0.24
0.23
PRESET OUTPUT VOLTAGES
Part Number
SA57031-25UK
SA57031-28UK
SA57031-30UK
SA57031-33UK
SA57031-36UK
Min
2.450
2.744
2.940
3.234
3.528
Typ
2.500
2.800
3.000
3.300
3.600
Max
2.550
2.856
3.060
3.366
3.672
2003 Jun 23
4
Philips Semiconductors
Product data
Micropower 150 mA, low-noise, low dropout linear
regulator with on/off
SA57031-XX
TYPICAL PERFORMANCE CURVES
Shown for the SA57031-28UK only; T
amb
= 25
°C;
V
I
= V
O
+ 1 V; V
On/Off
= V
I
; C
in
= 2.2
µF,
C
O
= 2.2
µF
unless otherwise specified
3.0
2.5
OUTPUT VOLTAGE (V)
2.0
1.5
1.0
0.5
0
0
1
2
3
4
5
6
I
O
= 30 mA
I
O
= 1mA
I
O
= 100 mA
LOAD REGULATION Vload(mV)
150
100
50
0
–50
–100
–150
0
50
100
150
INPUT VOLTAGE V
I
(V)
OUTPUT CURRENT I
O
(mA)
SL01970
SL01973
Figure 3. Output voltage versus input voltage.
Figure 6. Load regulation versus load current.
µ
DD
( A)
50
45
40
35
30
25
20
15
10
5
0
0
1
2
3
4
5
6
DROPOUT VOLTAGE Vio(V)
0.4
V
I
= 2.6 V, I
O
= 10 mA
NO-LOAD INPUT CURRENT I
0.3
0.2
0.1
0
0
50
100
150
INPUT VOLTAGE V
I
(V)
OUTPUT CURRENT I
O
(mA)
SL01971
SL01974
Figure 4. No-load input current versus input voltage.
Figure 7. Dropout voltage versus output current.
1.0
LINE REGULATION Vline (mV)
0.8
I
O
= 30 mA
3.0
2.5
OUTPUT VOLTAGE Vo(V)
2.0
1.5
1.0
0.5
0
V
I
= 5.0 V
V
I
= 6.0 V
V
I
= 3.8 V
0.6
0.4
0.2
–0.0
–0.2
–0.4
–0.6
–0.8
–1
3
3.5
4.0
4.5
5.0
5.5
6.0
0
100
200
300
400
INPUT VOLTAGE V
I
(V)
OUTPUT CURRENT I
O
(mA)
SL01972
SL01975
Figure 5. Line regulation versus input voltage.
Figure 8. Current limit versus output current.
2003 Jun 23
5
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