ST2L05-1500PT STMicroelectronics, ST2L05-1500PT Datasheet - Page 12

• Manufacturer Part Number: ST2L05-1500PT
• Description: IC REG LDO DUAL 1.5V/ADJ 5-PPAK
• Manufacturer: STMicroelectronics

Specifications of ST2L05-1500PT

• Regulator Topology: Positive Fixed and Adjustable
• Voltage - Output: 1.5V, 1.25 ~ 5.7 V
• Voltage - Input: 4.5 ~ 7 V
• Voltage - Dropout (typical): 1.1V @ 1A
• Number Of Regulators: 2
• Current - Output: 1A
• Current - Limit (min): 1A
• Operating Temperature: 0°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: PPAK (4 leads + tab)
• Number Of Outputs: 2
• Polarity: Positive
• Input Voltage Max: 7 V
• Output Voltage: 1.5 V, 1.225 V to 1.275 V
• Output Type: Adjustable, Fixed
• Dropout Voltage (max): 1.3 V at 1 A
• Output Current: 1 A, 1 A
• Line Regulation: 0.35 %
• Load Regulation: 0.4 %
• Voltage Regulation Accuracy: 2 %
• Maximum Operating Temperature: + 125 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: 0 C
• Reference Voltage: 1.275 V
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-3571-5

ST2L05
ELECTRICAL CHARACTERISTICS OF ADJUSTABLE OUTPUT (I
V
NOTE 1: Bandwidth of 10 Hz to 10KHz.
NOTE 2: 120Hz input ripple.
NOTE 3: C
NOTE 4: Guaranteed by design, not tested in production.
NOTE 5: % undershoot or overshoot of V
APPLICATION HINTS
EXTERNAL CAPACITORS
Like any low-dropout regulator, the ST2L05 requires external capacitors for stability. We suggest
soldering both capacitors as close as possible to the relative pins (1, 4 and 5).
INPUT CAPACITOR
An input capacitor, whose value is, at least, 2.2µF is required; the amount of the input capacitance can be
increased without limit if a good quality tantalum or aluminium capacitor is used.SMD 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 returned to a clean analog
ground.
OUTPUT CAPACITOR
The ST2L05 is designed specifically to work with Ceramic and Tantalum capacitors.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 ST2L05 and their relatively large capacitance can
12/24
I
Symbol
V
V
V
= 4.5V to 7V, C
I
I
SVR
O2
O2
I
OMIN
O2
V
V
V
ADJ
V
V
e
T
I
ADJ
S
S
S
N
O
O
D
R
O2
O2
/ I
/ I
/ V
O2
O2
I
I
= 20µF, C
Reference Voltage
Reference Voltage
Line Regulation 2
Load Regulation 2
Dropout Voltage V
Current Limit
Adjustable Current (sinking)
Adjustable Current Change I
Min Output Current for
regulation
RMS Output Noise
Supply Voltage
Rejection
Transient Response
Change of V
load change
Transient Response
Change of V
application of V
Transient Response Short
Circuit Removal
Response
Thermal Regulation
Temperature Stability
Long Term Stability
(1000Hrs)
1
and C
I
Parameter
= 4.7µF, C
(2)(4)
(3)(4)
(3)(4)
O1
OUT1
O2
I
= 10µF. C
with step
(3)(4)
with
(1)(4)
O
(4)
(4)
O1
= -1% I
(4)
O
.
I
, C
= C
O1
O2
I
T = 25°C
I
V
V
V
T = 25°C
V
V
V
0 to 5V step input, I
t
V
I
T
and C
O
O
O
O
r
O
J
I
I
I
I
I
I
I
= 5mA to 1A, V
= 5mA to 1A, V
= 4.75 to 5.25V, I
= 4.75V, I
= 1A
= 5.5V
= 10mA to 1A
= 5V
= 5V, I
= 5V, I
= 5V, I
= 1A, t
= 4.7 F, otherwise specified)
= 125°C
1µs
O2
are all X7R ceramic capacitors.
O
O
O
PULSE
= 1mA to 1A, t
= 1A to 1mA, t
= short to I
Test Conditions
O
= 10mA to 1A
= 30ms
I
I
= 4.75 to 5.25V,
= 4.75 to 5.25V
O
O
= 1mA to 1A,
= 5mA to 1A
O
= 10mA
r
f
1µs
1µs
O
= 10mA to 1A, T
1.225
1.212
Min.
60
1
0.003
Typ.
1.25
1.25
0.1
0.5
0.3
J
= 0 to 125°C,
1.275
1.287
Max.
10
10
10
20
0.35
200
0.4
1.3
1
2
(5)
(5)
(5)
(5)
%/W
Unit
mA
µA
nA
dB
%
%
%
%
%
%
%
%
V
V
V
A