LD39020
200 mA very low quiescent current linear regulator IC
Datasheet - production data
Applications
Mobile phones
Personal digital assistants (PDAs)
Digital still cameras (DSC)
Cordless phones and similar battery-
powered systems
Portable media players
Description
The LD39020 high accuracy voltage regulator
provides 200 mA of maximum current from an
input voltage ranging from 1.5 V to 5.5 V, with a
typical dropout voltage of 200 mV.
Features
Input voltage from 1.5 to 5.5 V
Ultra low dropout voltage (200 mV typ. at
200 mA load)
Very low quiescent current (20 µA typ at no
load, 0.03 µA typ in off mode)
Output voltage tolerance: ±0.5 % (A version)
or ± 2.0 % @ 25 °C (standard version)
200 mA guaranteed output current
High PSRR (80 dB@1 kHz, 50 db@100
kHz)
Wide range of output voltages available on
request: from 0.8 V up to 5.0 V in 50 mV
step
Logic-controlled electronic shutdown
Internal soft-start
Optional output voltage discharge feature
Compatible with ceramic capacitor
C
OUT
= 0.47 µF
Internal constant current and thermal
protections
Available in DFN 1x1-4L
Operating temperature range: -40 °C to
125 °C
It is available in DFN 1x1-4L package, allowing
the maximum space saving.
The device is stabilized with a ceramic capacitor
on the output. The ultra low drop voltage, low
quiescent current and low noise features,
together with the internal soft-start circuit, make
the LD39020 suitable for low power battery-
operated applications.
An enable logic control function puts the
LD39020 in shutdown mode allowing a total
current consumption lower than 0.1 µA. Constant
current and thermal protection are provided.
April 2014
DocID025316 Rev 2
1/26
www.st.com
This is information on a product in full production.
Contents
LD39020
Contents
1
2
3
4
5
6
Diagram ............................................................................................ 5
Pin configuration ............................................................................. 6
Typical application .......................................................................... 7
Maximum ratings ............................................................................. 8
Electrical characteristics ................................................................ 9
Application information ................................................................ 12
6.1
6.2
6.3
Soft start function ............................................................................ 12
Output discharge function ............................................................... 12
Input and output capacitors ............................................................. 12
7
8
9
10
Typical characteristics .................................................................. 13
Package mechanical data ............................................................. 18
8.1
DFN4 1x1 package info ................................................................... 19
Order codes ................................................................................... 22
Revision history ............................................................................ 25
2/26
DocID025316 Rev 2
LD39020
List of tables
List of tables
Table 1: Pin description .............................................................................................................................. 6
Table 2: Absolute maximum ratings ........................................................................................................... 8
Table 3: Thermal data ................................................................................................................................. 8
Table 4: ESD Performance ......................................................................................................................... 8
Table 5: Electrical characteristics for LD39020T, LD39020DT................................................................... 9
Table 6: Electrical characteristics for LD39020AT, LD39020ADT ............................................................ 10
Table 7: DFN 1x1-4L mechanical data ..................................................................................................... 20
Table 8: Order codes ................................................................................................................................ 22
Table 9: Document revision history .......................................................................................................... 25
DocID025316 Rev 2
3/26
List of figures
LD39020
List of figures
Figure 1: Block diagram .............................................................................................................................. 5
Figure 2: Pin connection (top view) ............................................................................................................ 6
Figure 3: Typical application circuits ........................................................................................................... 7
Figure 4: Output voltage vs. temperature (I
OUT
= 1 mA) ........................................................................... 13
Figure 5: Output voltage vs. temperature (I
OUT
= 200 mA) ....................................................................... 13
Figure 6: Line regulation vs. temperature ................................................................................................. 13
Figure 7: Load regulation vs. temperature ................................................................................................ 13
Figure 8: Quiescent current vs. temperature (I
OUT
= 0 mA) ...................................................................... 14
Figure 9: Quiescent current vs. temperature (I
OUT
= 200 mA) .................................................................. 14
Figure 10: Shutdown current vs. temperature .......................................................................................... 14
Figure 11: Quiescent current vs. load current .......................................................................................... 14
Figure 12: Quiescent current vs. input voltage ......................................................................................... 14
Figure 13: Dropout voltage vs temperature .............................................................................................. 14
Figure 14: Supply voltage rejection vs. frequency .................................................................................... 15
Figure 15: Supply voltage rejection vs. input voltage ............................................................................... 15
Figure 16: Output noise spectral density .................................................................................................. 15
Figure 17: Stability area vs (C
OUT
, ESR) ................................................................................................... 15
Figure 18: Enable startup (V
OUT
= 1 V) ..................................................................................................... 15
Figure 19: Enable startup (V
OUT
= 5 V) ..................................................................................................... 15
Figure 20: Turn-on time (V
OUT
= 1 V) ........................................................................................................ 16
Figure 21: Turn-off time (V
OUT
= 1 V) ........................................................................................................ 16
Figure 22: Turn-on time (V
OUT
= 5 V) ........................................................................................................ 16
Figure 23: Turn-off time (V
OUT
= 5 V) ........................................................................................................ 16
Figure 24: Line transient (V
OUT
= 1 V) ....................................................................................................... 16
Figure 25: Line transient (V
OUT
= 5 V) ....................................................................................................... 16
Figure 26: Load transient (V
OUT
= 1 V)...................................................................................................... 17
Figure 27: Load transient (V
OUT
= 5 V)...................................................................................................... 17
Figure 28: DFN 1x1-4L drawing ................................................................................................................ 19
Figure 29: DFN 1x1-4L footprint ............................................................................................................... 21
4/26
DocID025316 Rev 2
LD39020
Diagram
1
Diagram
Figure 1: Block diagram
The output discharge MOSFET is optional.
DocID025316 Rev 2
5/26
Analogue and Mixed Signal
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