ST2L05-3300
Very low quiescent current dual voltage regulator
Datasheet
-
production data
Description
Specifically designed for data storage
applications, this device integrates two voltage
regulators, each capable of supplying 1 A of
current. It is assembled in an 8-pin DFN8 5x6 mm
surface mounting package. One regulator block
supplies 3.3 V and, on request, 1.5 V, 1.8 V, 2.5 V,
2.8 V and 3.0 V. The other is adjustable from 1.25
V to V
I
- V
DROP
, which is suitable for powering
several different types of microcontroller. Both
outputs are current-limited and overtemperature
protected. Also noteworthy is the very good
thermal performance of the DFN package, with
only 2 °C/W of thermal resistance junction-to-
case.
DFN8 (5x6 mm)
Features
V
O1
: fixed
V
O2
: adjustable from 1.25 to V
I
- V
DROP
Guaranteed current of output 1: 1 A
Guaranteed current of output 2: 1 A
± 2% output tolerance (at 25 °C)
± 3% output tolerance at overtemperature
Typical dropout 1.1 V (I
O1
= I
O2
= 1 A)
Internal power and thermal limit
Good stability with low ESR output capacitor
Operating temperature range: 0 °C to 125 °C
Very low quiescent current: 7 mA max
overtemperature
Available in DFN8 5x6 mm package
Applications
Hard disk drives
CD/DVD-ROMs
CD/DVD-R/RWs
COMBO
®
(DVD-ROM+CD-R/RW)
Table 1. Device summary
Order code
ST2L05R3300PS
Package
DFN8 (5x6 mm)
Output voltage
Adjustable
October 2018
This is information on a product in full production.
DocID9506 Rev 8
1/28
www.st.com
Contents
ST2L05-3300
Contents
1
2
3
4
5
6
Block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Application hints . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1
6.2
6.3
6.4
External capacitors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Input capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Output capacitor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Adjustable regulator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
7
8
9
Typical characteristics
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Different output voltage versions of the ST2L05-3300
available on request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
10
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DocID9506 Rev 8
ST2L05-3300
Block diagram
1
Block diagram
Figure 1. Block diagram of the fixed / adjustable output version of the ST2L05-3300
DocID9506 Rev 8
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Pin configuration
ST2L05-3300
2
Pin configuration
Figure 2. Pin connection (top through view)
Table 2. Pin description
Pin n°
3
4
8
5
7
1, 2, 6
Symbol
V
I
ADJ
GND
V
O2
V
O1
NC
Name and function
Bypass with a 4.7 µF capacitor to GND
Resistor divider connection
Ground
Adjustable output voltage: bypass with a 4.7 µF capacitor to GND
Fixed output voltage: bypass with a 4.7 µF capacitor to GND
Not connected
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ST2L05-3300
Maximum ratings
3
Maximum ratings
Table 3. Absolute maximum ratings
Symbol
V
I
P
D
I
OSH
T
OP
T
STG
T
LEAD
1.
Parameter
Operating input voltage
Power dissipation
Short circuit output current - 3.3 V and adjustable output
Operating junction temperature range
Storage temperature range
(1)
Lead temperature (soldering) 10 sec.
Value
10
Internally limited
Internally limited
0 to 150
- 65 to 150
260
Unit
V
°C
°C
°C
Storage temperatures > 125°C are only acceptable if the dual regulator is soldered to a PCBA.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur.
Functional operation under these condition is not implied.
Table 4. Recommended operating conditions
Symbol
V
I
V
I
t
RISE
t
FALL
Input voltage
Input voltage ripple
Parameter
Value
4.5 to 7
± 0.15
1
1
Unit
V
V
µs
µs
Input voltage rise time (from 10% to 90%)
Input voltage fall time (from 10% to 90%)
Table 5. Thermal data
Symbol
R
thJC
R
thJA
Parameter
Thermal resistance junction-case
Thermal resistance junction-ambient
Value
2
36
Unit
°C/W
°C/W
DocID9506 Rev 8
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