Datasheet ST2L01PT, ST2L01K5 Datasheet (SGS Thomson Microelectronics)

ST2L01

DUAL VOLTAGE REGULATOR

■ V

■ V

■ GUARANTEED OUTPUT1 CURRENT: 1A

■ GUARANTEED OUTPUT2 CURRENT: 1A

■ ±2% OUTPUT TOLERANCE (AT 25°C)

■ TYPICAL DROPOUT 1.1V

■ INTERNAL POWER AND THERMAL LIMIT

■ STABLE WITH LOW ESR OUTPUT

= +3.3V FIXED

OUT1

= 1.25 TO 3.0V ADJUSTABLE

OUT2

(I

OUT1

= I

OUT2

=1A)

CAPACITOR

■ OPERATING TEMPERA TURE RANGE:

0°C TO 125°C

■ AVAILABLE IN PPAK AND SPAK-5L

(PowerFlex) PACKAGE

DESCRIPTION

Specifically designed for data storage
applications, this device integrates two voltage
regulators, each one able to supply 1A. It is
assembled in PPAK and in a new surface
mounting pa ckage named SPAK ( PowerFle x) 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

PPAK

SPAK-5L

(PowerFlex

)

could power several kind of different
micro-controllers.
Both outputs are current limited and
overtemperature protected.
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

Thermal

Thermal

Protection

Protection

Err-Amp

Err-Amp

Err-Amp Power OutputVREF2

Err-Amp Power OutputVREF2

Over current

Over current

Protection

Protection

Power OutputVREF1

Power OutputVREF1

Over current

Over current

Protection

Protection

RA

RA

RB

RB

GND

GND

VOUT1

VOUT1

VOUT2

VOUT2

ADJ

ADJ

1/12March 2002

ST2L01

ABSOLUTE MAXIMUM RATINGS

Symbol Parameter Value Unit

V

V

ESD

T

T

GENERAL OPERATING CONDITION

Symbol Parameter Value Unit

V

∆V

THERMAL DATA

Symbol Parameter SPAK-5L PPAK Unit

R

thj-case

Input Voltage

IN

ESD Tolerance (Human Body Model)
Storage Temperature Range

stg

Operating Junction Temperature Range

J

Input Voltage

IN

Input Voltage Ripple

IN

t

Input Voltage Rise Time (10% to 90%)

r

t

Input Voltage Fall Time (90% to 10%)

f

Thermal Resistance Junction-case

10 V

4KV

-55 to +125 °C

0 to +125 °C

4.75 to 5.25 V

±0.15 V

≥ 1 µs
≥ 1 µs

2 8 °C/W

CONNECTION DIAGRAM (top view)

PPAK SPAK-5L

PIN DESCRIPTION

Pin N° Symbol Name and Function

1V

I

Input pin: bypass with a 1µF capacitor to GND

2 ADJ ADJ pin: resistor divider connection
3 GND Ground pin
4V

5V

O2
O1

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

ORDERING INFORMATION

TYPE SPAK (Power Flex) 5 leads (*) PPAK (*)

ST2L01 ST2L01K5 ST2L01PT

(*) Avai l abl e in Tape & Re el wi th the suffix "R"

2/12

ST2L01

TYPICAL APPLICATION CIRCUIT

R

VO = V

REF

Note:
C

value could be lowered down to 470n F Ceramic Capacitor (X7R);

O1

C

, CO1 and CO2 capacitors must be located not more than 0.5" from the outputs pins of t he device.

I

For mor e details about Capacitors read the "Application Hint s"

ELECTRICAL CHARACTERISTICS OF OUTPUT 1 (VI=5V, IO1=10mA Tj = 0 to 125°C unless otherwise

specified. Typical values are referred at T

Symbol Parameter Test Conditions Min. Typ. Max. Unit

I

Input Current IO1 = IO2 =0 Tj = 0 to 125°C 15 28 mA

I

V

Output Voltage 1 Tj = 25°C 3.23 3.3 3.37 V

O1

I

O1

T

∆V

∆V

SVR1 Supply Voltage Rejection V

∆V
∆V

Note 1: Low duty cycle p ul se testing wi t h Kelvin connections are required in order to maintain accurate data
Note 2: Dropout Voltage is defined as the minimum differential voltage between V

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: Min i m um lo ad current is defined as the minimum current requi red at the output in ord er for the output voltage to maintain regulation.
Note 5: Guaranteed by design, not tested in production.

Line Regulation 1 VI = 4.75 to 5.25V 0.1 6 mV

O1

Load Regulation 1 IO = 0.01 to 1A (Note 1) 3 12 mV

OUT1

V

Dropout Voltage 1 IO = 1A Tj = 0 to 125°C

D1

(Note 2)

t

Transient Response IO = 10 to 500mA t

TR

(Note 3, 5)

Current Limit 1 RL = 0 Tj = 0 to 125°C 1 A

I

SC1

I

Minimum Load Current 1 Tj = 0 to 125°C (Note 4) 0 mA

O1

I

O1

T
(Note 5)

Thermal Regulation I

O

eN1 Output Noise B= 10Hz to 10KHz (Note 5) 40 µVrms

Temperature Stability Tj = 0 to 125°C (Note 5) 0.5 %V

O1

Long Term Stability Tj = 125°C, 1000Hrs (Note 5) 0.3 %V

O1

= 25°C, CI = 1µF (Tantalum), CO1 = CO1 =1µF (X7R)

j

= 5mA to 1A VI = 4.75 to 5.25V

= 0 to 125°C

j

3.2 3.3 3.4

1.1 1.3 V

= t

= 1µs

fall

f

= 100Hz 60 68 dB

I

f

= 1KHz 60 70

I

f

= 10KHz 50 65

I

f

= 100KHz 30 38

I

= 30ms (Note 5) 0.1 %/W

and VO requir ed to m anta in re gulat ion at VO. It is measured

I

= 5 ±0.25V

I

= 100 mA

= 0 to 125°C

j

= 1A, t

rise

PULSE

<1 µs

1

(1 + )+I

R

2

ADJR1

O
O

3/12

ST2L01

ELECTRICAL CHARACTERISTICS OF OUTPUT 2 (VI=5V, IO2=10mA Tj = 0 to 125°C unless otherwise

specified. Typical values are referred at T
"Typical Application Circuit "figure with R

Symbol Parameter Test Conditions Min. Typ. Max. Unit

V

Operating Input Voltage IO2 =5mA to 1A Tj = 0 to 125°C 4.5 V

I

V

Output Voltage 2 Tj = 25°C 2.45 2.5 2.55 V

O2

V

∆V
∆V

∆I

SVR2 Supply Voltage Rejection V

∆V
∆V

Note 1: Low duty cycle p ul se testing wi t h Kelvin connections are required in order to maintain accurate data
Note 2: Dropout Voltage is defined as the minimum differential voltage between V

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: Min i m um lo ad current is defined as the minimum current requi red at the output in ord er for the output voltage to maintain regulation.
Note 5: Guaranteed by design, not tested in production.

Reference Voltage

REF

(measured between pins 4
and 2)

Line Regulation 2 VI = 4.75 to 5.25V 0.004 0.2 %

O2

Load Regulation 2 IO = 0.01 to 1A (Note 1) 0.08 0.4 %

O2

V

Dropout Voltage 2 IO = 1A Tj = 0 to 125°C

D2

Tj = 25°C 1.225 1.25 1.275 V
I

T

(Note 2)

Transient Response IO = 10 to 500mA t

t

TR

(Note 3, 5)

I

Current Limit 2 RL = 0 Tj = 0 to 125°C 1 A

SC2

I

Minimum Load Current 2 Tj = 0 to 125°C (Note 4) 1 mA

O2

I

Adjust Pin Current Tj = 0 to 125°C 35 120 µA

ADJ

Adjust Pin Current IO1 = 5mA to 1A VI = 4.75 to 5.25V

ADJ

T

I
T
(Note 5)

Thermal Regulation 2 I

eN2 Output Noise 1 B= 10Hz to 10KHz (Note 5) 30 µVrms

Temperature Stability Tj = 0 to 125°C (Note 5) 0.5 %V

REF

Long Term Stability Tj = 125°C, 1000Hrs (Note 5) 0.3 %V

REF

= 25°C, CI = 1µF (Tantalum), CO1 = CO1 =1µF (X7R). Refer to

j

=120Ω".

1=R2

= 5mA to 1A VI = 4.75 to 5.25V

O1

= 0 to 125°C

j

1.2125 1.25 1.2875

1.1 1.3 V

= t

rise

fall

= 1µs

<1 µs

05µA

= 0 to 125°C

j

= 5 ±0.25V

I

= 100 mA

O1

= 0 to 125°C

j

= 1A, t

O

PULSE

f

= 100Hz 70 77 dB

I

f

= 1KHz 70 80

I

f

= 10KHz 50 65

I

f

= 100KHz 30 43

I

= 30ms (Note 5) 0.1 %/W

and VO requir ed to m anta in re gulat ion at VO. It is measured

I

O
O

4/12

APPLICATION HINTS

ST2L01

EXTERNAL CAPACITORS

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).

INPUT CAPACITORS

An input capacitor, whose value is at least 1µF, is
required; the amount of the input capacitance c an
be increased without limit if a good quality
tantalum or aluminum capacitor is used.
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 t he us e of the output c ap ac itors.
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.

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 ST2 L01 and their relatively large
capacitance can change a lot with the ambient
temperature.
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 t o 10µF wh en a tantalum capacitor
is used on the inp ut. A higher v alue C

can have

O

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

to 2.2µF if C
C

=2.2µF.

I

=1µF, and from 1µF to 4.7µF if

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.
When a ceramic capac itor is used in the input the

output capacitance must be in the range from 1µF
to 2.2µF if C
C

=2.2µF.

I

=1µF, and from 1µF to 4.7µF if

I

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 a transient
response and noise.

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 temperatu re coefficent
is the X7R type, which holds the capacitance
within ±15% . The output capacitor should be
located not more than 0.5" from the ou tput pins of
the device and returned to a clean analog ground.

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 t herminals a constant
current flows through R2 and down to R1 to set
the overall (V

to GND) output voltage.

O2

Minimum load current is 1mA.
I

is very small (typically 35µA) and constant; in

ADJ

the V

calculation it can be ignored.

O

5/12

ST2L01

TYPICAL CHARACTERISTICS (CI=1µF, CO=1µF (X7R))
Figure 1 : Input Current vs Temperature

Figure 2 : Input Current vs Input Voltage

Figure 4 : Load Regulation vs Temperature

Figure 5 : Output Voltage vs Input Voltage

Figure 3 : Output Voltage vs Temperature

6/12

Figure 6 : Dropout Voltage vs Temperature

ST2L01

Figure 7 : Line Regulation vs Temperature

Figure 8 : Supply Voltage Rejection vs

Frequency

Figure 10 : Dropout Voltage vs Output Current

Figure 11 : Reference Voltage vs Temperature

Figure 9 : Supply Voltage Rejection vs

Temperature

Figure 12 : Output Voltage vs Input Voltage

7/12

ST2L01

Figure 13 : Line Regulation vs Temperature

Figure 14 : Load Regulation vs Temperature

Figure 16 : Dropout Voltage vs Temperature

Figure 17 : Dropout Voltage vs Output Current

Figure 15 : Supply Voltage Rejection vs

Temperature

8/12

Figure 18 : Supply Voltage Rejection vs
Frequency

ST2L01

V

I

C

F(X7R), T

°C

V

V

I

C

F(X7R)

V

V

I

500mA, C

F(X7R)

V

I

C

F(X7R)

Figure 19 : Adjustable pin vs Temperature

Figure 20 : Minimum Load Current vs

Temperature

Figure 22 : Load Transient

=5V,

I

T

J

=adjusted to 2.5V,

O

=25°C

=500 to 10mA,

O

Figure 23 : Load Transient

O

=1µ

Figure 21 : Load Transient

=5V,

I

=500 to 10mA,

O1

O

=1µ

J

=25

=5V,

I

O

=adjusted to 2.5V,

=10 to

O2

Figure 24 : Load Transient

=5V,

I

=10 to 500mA,

O1

=1µ

O

=1µ

O

9/12

ST2L01

SPAK-5L MECHANICAL DATA

DIM.

A 1.78 2.03 0.070 0.080

A2 0.03 0.13 0.001 0.005

C 0.25 0.010

C1 0.25 0.010

D 1.02 1.27 0.040 0.050

D1 7.87 8.13 0.310 0.320

F 0.63 0.79 0.025 0.031

G 1.69 0.067
G1 6.8 0.268
H1 5.59 0.220
H2 9.27 9.52 0.365 0.375
H3 8.89 9.14 0.350 0.360

L 10.41 10.67 0.410 0.420
L1 7.49 0.295
L2 8.89 9.14 0.350 0.360

M 0.79 1.04 0.031 0.041
N 0.25 0.010

V3˚ 6˚3˚ 6˚

MIN. TYP MAX. MIN. TYP. MAX.

mm. inch

10/12

PO13F1/B

PPAK MECHANICAL DATA

ST2L01

DIM.

MIN. TYP MAX. MIN. TYP. MAX.

A 2.2 2.4 0.086 0.094
A1 0.9 1.1 0.035 0.043
A2 0.03 0.23 0.001 0.009

B 0.4 0.6 0.015 0.023
B2 5.2 5.4 0.204 0.212

C 0.45 0.6 0.017 0.023

C2 0.48 0.6 0.019 0.023

D 6 6.2 0.236 0.244

E 6.4 6.6 0.252 0.260

G 4.9 5.25 0.193 0.206

G1 2.38 2.7 0.093 0.106

H 9.35 10.1 0.368 0.397
L2 0.8 0.031
L4 0.6 1 0.023 0.039

mm. inch

0078180-B

11/12

ST2L01

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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
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12/12