ST2L01 [STMICROELECTRONICS]
DUAL VOLTAGE REGULATOR; 双电压稳压器
| 型号： | ST2L01 |
| 厂家： | 
ST |
| 描述： | DUAL VOLTAGE REGULATOR |
| 文件： | 总12页 (文件大小：381K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ST2L01
DUAL VOLTAGE REGULATOR
■
■
■
■
■
■
V
V
= +3.3V FIXED
= 1.25 TO 3.0V ADJUSTABLE
OUT1
OUT2
GUARANTEED OUTPUT1 CURRENT: 1A
GUARANTEED OUTPUT2 CURRENT: 1A
±2% OUTPUT TOLERANCE (AT 25°C)
TYPICAL DROPOUT 1.1V
(I
= I
=1A)
OUT1
OUT2
PPAK
SPAK-5L
(PowerFlex
■
■
INTERNAL POWER AND THERMAL LIMIT
STABLE WITH LOW ESR OUTPUT
CAPACITOR
)
■
■
OPERATING TEMPERATURE RANGE:
0°C TO 125°C
AVAILABLE IN PPAK AND SPAK-5L
(PowerFlex ) PACKAGE
could power several
micro-controllers.
kind of
different
DESCRIPTION
Specifically designed
Both
outputs
are
current
limited and
for
data
storage
overtemperature protected.
applications, this device integrates two voltage
regulators, each one able to supply 1A. It is
assembled in PPAK and in a new surface
mounting package named SPAK (PowerFlex ) at
5 pins. The first regulator block supply 3.3V to
power the Read Channel and Memory Chips
requiring this voltage. The second one is an
Adjustable output voltage from 1.25V to 3.0V that
The very good thermal performances of the
package SPAK with only 2°C/W of Thermal
Resistance Junction to Case is important to
underline.
SCHEMATIC DIAGRAM
Over current
Protection
VOUT1
VREF1
Power Output
Err-Amp
RA
RB
Thermal
Protection
GND
VREF2
Err-Amp
Power Output
VOUT2
Over current
Protection
ADJ
March 2002
1/12
ST2L01
ABSOLUTE MAXIMUM RATINGS
Symbol
Parameter
Value
Unit
V
Input Voltage
10
4
V
IN
V
ESD Tolerance (Human Body Model)
Storage Temperature Range
KV
°C
°C
ESD
T
-55 to +125
0 to +125
stg
T
Operating Junction Temperature Range
J
GENERAL OPERATING CONDITION
Symbol
Parameter
Value
Unit
V
Input Voltage
4.75 to 5.25
±0.15
≥ 1
V
V
IN
∆V
Input Voltage Ripple
IN
t
Input Voltage Rise Time (10% to 90%)
Input Voltage Fall Time (90% to 10%)
µs
µs
r
t
≥ 1
f
THERMAL DATA
Symbol
Parameter
SPAK-5L
PPAK
Unit
R
Thermal Resistance Junction-case
2
8
°C/W
thj-case
CONNECTION DIAGRAM (top view)
PPAK
SPAK-5L
PIN DESCRIPTION
Pin N°
Symbol
Name and Function
1
V
Input pin: bypass with a 1µF capacitor to GND
I
2
3
4
ADJ
ADJ pin: resistor divider connection
Ground pin
GND
V
V
Output Pin: adjustable output voltage; bypass with a 1µF capacitor to GND
Output Pin: fixed (3.3V) output voltage; bypass with a 1µF capacitor to GND
O2
O1
5
ORDERING INFORMATION
TYPE
SPAK (Power Flex ) 5 leads (*)
PPAK (*)
ST2L01
ST2L01K5
ST2L01PT
(*) Available in Tape & Reel with the suffix "R"
2/12
ST2L01
TYPICAL APPLICATION CIRCUIT
R
R
1
2
V
= V
(1 +
)+I
R
ADJ 1
O
REF
Note:
C
value could be lowered down to 470nF Ceramic Capacitor (X7R);
O1
C , C and C capacitors must be located not more than 0.5" from the outputs pins of the device.
I
O1
O2
For more details about Capacitors read the "Application Hints"
ELECTRICAL CHARACTERISTICS OF OUTPUT 1 (V =5V, I =10mA T = 0 to 125°C unless otherwise
I
O1
j
specified. Typical values are referred at T = 25°C, C = 1µF (Tantalum), C = C =1µF (X7R)
j
I
O1
O1
Symbol
Parameter
Input Current
Test Conditions
Min.
Typ.
Max.
28
Unit
mA
V
I
I
= I =0
T = 0 to 125°C
15
3.3
3.3
I
O1
O2
j
V
Output Voltage 1
T = 25°C
3.23
3.2
3.37
3.4
O1
j
I
= 5mA to 1A
V = 4.75 to 5.25V
O1
I
T = 0 to 125°C
j
∆V
Line Regulation 1
Load Regulation 1
Dropout Voltage 1
V = 4.75 to 5.25V
0.1
3
6
mV
mV
V
O1
I
∆V
I
I
= 0.01 to 1A
(Note 1)
12
1.3
OUT1
O
V
= 1A
T = 0 to 125°C
1.1
D1
O
j
(Note 2)
= 10 to 500mA t
t
Transient Response
I
= t = 1µs
<1
µs
TR
O
rise
fall
(Note 3, 5)
R = 0
I
Current Limit 1
T = 0 to 125°C
1
A
SC1
L
j
I
Minimum Load Current 1
T = 0 to 125°C
(Note 4)
f = 100Hz
0
mA
dB
O1
j
SVR1 Supply Voltage Rejection
V = 5 ±0.25V
60
60
50
30
68
70
65
38
0.1
I
I
I
= 100 mA
O1
f = 1KHz
I
T = 0 to 125°C
j
f = 10KHz
I
(Note 5)
f = 100KHz
I
Thermal Regulation
I
= 1A,
t
= 30ms (Note 5)
%/W
O
PULSE
eN1
Output Noise
B= 10Hz to 10KHz (Note 5)
T = 0 to 125°C (Note 5)
40
µVrms
∆V
∆V
Temperature Stability
0.5
%V
%V
O1
j
O
Long Term Stability
T = 125°C, 1000Hrs (Note 5)
0.3
O1
j
O
Note 1: Low duty cycle pulse testing with Kelvin connections are required in order to maintain accurate data
Note 2: Dropout Voltage is defined as the minimum differential voltage between V and V required to mantain regulation at V . It is measured
I
O
O
when the output voltage drops 1% below its nominal value.
Note 3: Transient response is defined with a step change in load from 10mA to 500mA as the time from the load step until the output voltage
reaches it’s minimum value.
Note 4: Minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation.
Note 5: Guaranteed by design, not tested in production.
3/12
ST2L01
ELECTRICAL CHARACTERISTICS OF OUTPUT 2 (V =5V, I =10mA T = 0 to 125°C unless otherwise
I
O2
j
specified. Typical values are referred at T = 25°C, C = 1µF (Tantalum), C = C =1µF (X7R). Refer to
j
I
O1
O1
"Typical Application Circuit "figure with R =R =120Ω".
1
2
Symbol
Parameter
Operating Input Voltage
Output Voltage 2
Test Conditions
=5mA to 1A T = 0 to 125°C
Min.
Typ.
Max.
Unit
V
V
I
4.5
2.45
1.225
I
O2
j
V
T = 25°C
2.5
2.55
V
O2
j
V
Reference Voltage
(measured between pins 4
and 2)
T = 25°C
1.25
1.275
V
REF
j
I
= 5mA to 1A
V = 4.75 to 5.25V
1.2125 1.25 1.2875
O1
I
T = 0 to 125°C
j
∆V
∆V
Line Regulation 2
Load Regulation 2
Dropout Voltage 2
V = 4.75 to 5.25V
0.004
0.08
1.1
0.2
0.4
1.3
%
%
V
O2
I
I
I
= 0.01 to 1A
(Note 1)
O2
O
V
= 1A
T = 0 to 125°C
j
D2
O
(Note 2)
= 10 to 500mA t
t
Transient Response
I
= t = 1µs
<1
µs
TR
O
rise
fall
(Note 3, 5)
R = 0
I
Current Limit 2
T = 0 to 125°C
1
1
A
SC2
L
j
I
Minimum Load Current 2
Adjust Pin Current
Adjust Pin Current
T = 0 to 125°C
(Note 4)
mA
µA
µA
O2
j
I
T = 0 to 125°C
35
0
120
5
ADJ
j
∆I
I
= 5mA to 1A
V = 4.75 to 5.25V
I
ADJ
O1
T = 0 to 125°C
j
SVR2 Supply Voltage Rejection
V = 5 ±0.25V
f = 100Hz
70
70
50
30
77
80
65
43
0.1
dB
I
I
I
= 100 mA
O1
f = 1KHz
I
T = 0 to 125°C
j
f = 10KHz
I
(Note 5)
f = 100KHz
I
Thermal Regulation 2
I
= 1A,
t
= 30ms (Note 5)
%/W
O
PULSE
eN2
Output Noise 1
B= 10Hz to 10KHz (Note 5)
T = 0 to 125°C (Note 5)
30
µVrms
∆V
Temperature Stability
0.5
%V
%V
REF
REF
j
O
O
∆V
Long Term Stability
T = 125°C, 1000Hrs (Note 5)
0.3
j
Note 1: Low duty cycle pulse testing with Kelvin connections are required in order to maintain accurate data
Note 2: Dropout Voltage is defined as the minimum differential voltage between V and V required to mantain regulation at V . It is measured
I
O
O
when the output voltage drops 1% below its nominal value.
Note 3: Transient response is defined with a step change in load from 10mA to 500mA as the time from the load step until the output voltage
reaches it’s minimum value.
Note 4: Minimum load current is defined as the minimum current required at the output in order for the output voltage to maintain regulation.
Note 5: Guaranteed by design, not tested in production.
4/12
ST2L01
APPLICATION HINTS
EXTERNAL CAPACITORS
to 2.2µF if C =1µF, and from 1µF to 4.7µF if
I
C =2.2µF.
Like any low-dropout regulator, the ST2L01
requires external capacitors for stability. We
suggest to solder both capacitors as close as
possible to the relative pins (1, 2 and 5).
I
The 3.3V regulator stable with a 470nF capacitor.
This value can be increased up to 10µF if a
tantalum capacitor is used on the input. A higher
value C can have an ESR lower than the
O
accepted minimum.
INPUT CAPACITORS
An input capacitor, whose value is at least 1µF, is
required; the amount of the input capacitance can
be increased without limit if a good quality
tantalum or aluminum capacitor is used.
When a ceramic capacitor is used in the input the
output capacitance must be in the range from 1µF
to 2.2µF if C =1µF, and from 1µF to 4.7µF if
I
C =2.2µF.
I
SMS X7R or Y5V ceramic multilayer capacitors
could not ensure stability in any condition because
of their variable characteristics with Frequency
and Temperature; the use of this capacitor is
strictly related to the use of the output capacitors.
For more details read the "OUTPUT CAPACITOR
SECTION".
The input capacitor must be located at a distance
of not more than 0.5" from the input pin of the
device and returened to a clean analog ground.
Surface-mountable solid tantalum capacitors offer
a good combination of small physical size for the
capacitance value and ESR in the range needed
by the ST2L01. The test results show good
stability for both outputs with values of at least
1µF. The value can be increased without limit for
even better performance such
response and noise.
a
transient
IMPORTANT; The output capacitor must maintain
its ESR in the stable region over the full operating
temperature to assure stability. Also , capacitor
tolerance and variation with temperature must be
considered to assure that the minimum amount of
capacitance is provided at all times. For this
reason, when a ceramic multilayer capacitor is
used, the better choise for temperature coefficent
is the X7R type, which holds the capacitance
within ±15% . The output capacitor should be
located not more than 0.5" from the output pins of
the device and returned to a clean analog ground.
OUTPUT CAPACITOR
The ST2L01 is designed specifically to work with
Ceramic and Tantalum capacitros.
Special care must be taken when a Ceramic
multilayer capacitor is used.
Special care must be taken when a Ceramic
multilayer capacitor is used.
Due to their characteristics they can sometimes
have an ESR value lower than the minimum
required by the ST2L01 and their relatively large
capacitance can change a lot with the ambient
temperature.
ADJUSTABLE REGULATOR
The ST2L01 has a 1.25V reference voltage
between the output and the adjustable pins
(respectevely pin 4 and 2). When a resistor R2 is
placed between these two therminals a constant
current flows through R2 and down to R1 to set
The test results of the ST2L01 stability using
multilayer ceramic capacitors show that
a
minimum value of 1µF is needed for the adjustable
regulator (set to 2.5V). This value can be
increased up to 10µF when a tantalum capacitor
the overall (V to GND) output voltage.
O2
is used on the input. A higher value C can have
O
Minimum load current is 1mA.
an ESR lower than the accepted minimum.
When a ceramic capacitor is used on the input the
output capacitance must be in the range from 1µF
I
is very small (typically 35µA) and constant; in
ADJ
the V calculation it can be ignored.
O
5/12
ST2L01
TYPICAL CHARACTERISTICS (C =1µF, C =1µF (X7R))
I
O
Figure 1 : Input Current vs Temperature
Figure 4 : Load Regulation vs Temperature
Figure 5 : Output Voltage vs Input Voltage
Figure 6 : Dropout Voltage vs Temperature
Figure 2 : Input Current vs Input Voltage
Figure 3 : Output Voltage vs Temperature
6/12
ST2L01
Figure 7 : Line Regulation vs Temperature
Figure 10 : Dropout Voltage vs Output Current
Figure 8 : Supply Voltage Rejection vs
Figure 11 : Reference Voltage vs Temperature
Frequency
Figure 9 : Supply Voltage Rejection vs
Figure 12 : Output Voltage vs Input Voltage
Temperature
7/12
ST2L01
Figure 13 : Line Regulation vs Temperature
Figure 16 : Dropout Voltage vs Temperature
Figure 14 : Load Regulation vs Temperature
Figure 17 : Dropout Voltage vs Output Current
Figure 15 : Supply Voltage Rejection vs
Figure 18 : Supply Voltage Rejection vs
Temperature
Frequency
8/12
ST2L01
Figure 19 : Adjustable pin vs Temperature
Figure 22 : Load Transient
V =5V, V =adjusted to 2.5V, I =500 to 10mA, C =1µF(X7R)
I
O
O
O
T =25°C
J
Figure 20 : Minimum Load Current vs
Figure 23 : Load Transient
Temperature
V =5V, V =adjusted to 2.5V, I =10 to 500mA, C =1µF(X7R)
I
O
O2
O
Figure 21 : Load Transient
Figure 24 : Load Transient
V =5V, I =500 to 10mA, C =1µF(X7R), T =25°C
V =5V, I =10 to 500mA, C =1µF(X7R)
I O1 O
I
O1
O
J
9/12
ST2L01
SPAK-5L MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
1.78
0.03
TYP
MAX.
2.03
MIN.
0.070
0.001
MAX.
0.080
0.005
A
A2
C
0.13
0.25
0.25
0.010
0.010
C1
D
1.02
7.87
0.63
1.27
8.13
0.79
0.040
0.310
0.025
0.050
0.320
0.031
D1
F
G
1.69
6.8
0.067
0.268
0.220
G1
H1
H2
H3
L
5.59
9.27
8.89
9.52
9.14
0.365
0.350
0.410
0.375
0.360
0.420
10.41
10.67
L1
L2
M
7.49
0.25
0.295
0.010
8.89
0.79
9.14
1.04
0.350
0.031
0.360
0.041
N
V
3˚
6˚
3˚
6˚
PO13F1/B
10/12
ST2L01
PPAK MECHANICAL DATA
mm.
inch
TYP.
DIM.
MIN.
2.2
TYP
MAX.
2.4
MIN.
0.086
0.035
0.001
0.015
0.204
0.017
0.019
0.236
0.252
0.193
0.093
0.368
MAX.
0.094
0.043
0.009
0.023
0.212
0.023
0.023
0.244
0.260
0.206
0.106
0.397
A
A1
A2
B
0.9
1.1
0.03
0.4
0.23
0.6
B2
C
5.2
5.4
0.45
0.48
6
0.6
C2
D
0.6
6.2
E
6.4
6.6
G
4.9
5.25
2.7
G1
H
2.38
9.35
10.1
L2
L4
0.8
0.031
0.6
1
0.023
0.039
0078180-B
11/12
ST2L01
Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the
consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from
its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications
mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information
previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or
systems without express written approval of STMicroelectronics.
© The ST logo is a registered trademark of STMicroelectronics
© 2002 STMicroelectronics - Printed in Italy - All Rights Reserved
STMicroelectronics GROUP OF COMPANIES
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© http://www.st.com
12/12
相关型号：
ST2L01K5R
DUAL OUTPUT, FIXED/ADJUSTABLE POSITIVE LDO REGULATOR, PSSO5, POWER FLEX SPAK-5
STMICROELECTR
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