ST1L08PUR [STMICROELECTRONICS]

800 mA ultra low drop, high PSRR voltage regulator;
ST1L08PUR
型号: ST1L08PUR
厂家: ST    ST
描述:

800 mA ultra low drop, high PSRR voltage regulator

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ST1L08  
800 mA ultra low drop, high PSRR voltage regulator  
Datasheet - production data  
Applications  
Consumer  
Hard disk drives, SSD  
Computer  
Battery-powered systems  
Low voltage point of load  
Description  
The ST1L08 provides 0.8 A of maximum current  
from an input voltage in the range from 1 V to  
5.5 V, with a typical dropout voltage as low as  
70 mV.  
It is stabilized with a ceramic capacitor on the  
output.  
Features  
Input voltage from 1 to 5.5 V  
Ultra low-dropout voltage (90 mV max. @  
800 mA load)  
The very low drop voltage, low quiescent current  
and high PSRR features make it suitable for low  
power battery-powered applications.  
Low ground current (35 μA typ. @ no load)  
Output voltage tolerance: ± 2.0% @ 25 °C  
High PSRR: 80 dB @ 100 Hz, 50 dB @  
1 MHz  
Enable logic control function puts the ST1L08 in  
shutdown mode, reducing the total current  
consumption.  
800 mA guaranteed output current  
Wide range of output voltages available on  
request: from 0.5 V to 4 V and adjustable  
Logic-controlled electronic shutdown  
Internal current and thermal limit  
Power Good function  
Available in DFN8 2x3 mm package  
Temperature range: -40 °C to 125 °C  
Input voltage control for the ST1L08Sxx  
Power Good function and input voltage control  
feature the ST1L08Sxx version.  
The device is equipped with current limit and  
thermal protection.  
Table 1: Device summary  
Order code  
ST1L08SPU12R  
ST1L08SPU33R  
ST1L08SPUR  
ST1L08PUR  
Power Good and VIN control  
Package  
Output voltages  
1.2 V  
Yes  
Yes  
Yes  
No  
3.3 V  
DFN8 (2x3 mm)  
Adjustable  
Adjustable  
November 2015  
DocID026624 Rev 2  
1/21  
www.st.com  
This is information on a product in full production.  
Contents  
ST1L08  
Contents  
1
2
3
4
5
6
Diagram............................................................................................3  
Pin configuration.............................................................................4  
Typical application ..........................................................................5  
Maximum ratings.............................................................................6  
Electrical characteristics ................................................................7  
Application information ................................................................11  
6.1  
6.2  
6.3  
6.4  
Thermal and short-circuit protections..............................................11  
Output voltage setting for ADJ version............................................11  
Bias pin voltage requirements.........................................................11  
External capacitors requirements....................................................11  
7
8
Typical characteristics..................................................................12  
Package information .....................................................................16  
8.1  
8.2  
DFN8 (2x3 mm) package information .............................................16  
DFN8 (2x3 mm) packing information...............................................18  
9
Revision history ............................................................................20  
2/21  
DocID026624 Rev 2  
ST1L08  
Diagram  
1
Diagram  
Figure 1: Block diagram  
DocID026624 Rev 2  
3/21  
Pin configuration  
ST1L08  
2
Pin configuration  
Figure 2: Pin connection (top view)  
Table 2: Pin description  
Function  
Symbol  
VIN  
Input voltage of the LDO (power element)  
VBIAS  
GND  
EN  
Bias input of the LDO  
Common ground  
Enable pin logic input: low = shutdown, high = active  
Adjustable pin (on adjustable version)  
Output voltage of the LDO  
ADJ  
VOUT  
PG  
Power Good pin (not connected on the ST1L08PUR)  
Not connected  
NC  
EXP  
Exposed pad (should be connected to GND)  
4/21  
DocID026624 Rev 2  
ST1L08  
Typical application  
3
Typical application  
Figure 3: Typical application circuits  
Power Good feature is not present on the ST1L08PUR.  
DocID026624 Rev 2  
5/21  
Maximum ratings  
ST1L08  
4
Maximum ratings  
Table 3: Absolute maximum ratings  
Symbol  
VIN  
Parameter  
Value  
Unit  
V
DC input voltage  
DC bias voltage  
DC output voltage  
- 0.3 to 7  
VBIAS  
VOUT  
VEN  
- 0.3 to 7  
V
- 0.3 to VI + 0.3  
- 0.3 to VBIAS + 0.3  
- 0.3 to VBIAS + 0.3  
- 0.3 to VBIAS + 0.3  
Internally limited  
Internally limited  
- 65 to 150  
V
Enable input voltage  
Power Good pin voltage  
ADJ pin voltage  
V
VPG  
V
VADJ  
IOUT  
V
Output current  
mA  
mW  
°C  
°C  
PD  
Power dissipation  
TSTG  
TOP  
Storage temperature range  
Operating junction temperature range  
- 40 to 125  
Absolute maximum ratings are those values beyond which damage to the device  
may occur. Functional operation under these conditions is not implied. All values  
are referred to GND.  
Table 4: Thermal data  
Symbol  
RthJA  
Parameter  
Thermal resistance junction-ambient  
Thermal resistance junction-case  
DFN8 (2x3 mm)  
Unit  
°C/W  
°C/W  
55  
12  
RthJC  
6/21  
DocID026624 Rev 2  
ST1L08  
Electrical characteristics  
5
Electrical characteristics  
TJ = 25 °C, VIN = 1.5 V, VBIAS = 3.6 V, VOUT = VADJ, CIN = CBIAS = 1 μF, COUT = 4.7 μF,  
VEN = VBIAS, unless otherwise specified.  
Table 5: Electrical characteristics for the ST1L08 (adjustable)  
Symbol  
Parameter  
Test conditions  
Min.  
Typ.  
Max.  
Unit  
Operating input  
voltage  
VIN  
1
5.5  
V
Operating bias  
voltage (1)  
VBIAS  
IIN  
2.7  
5.5  
10  
V
VIN operating  
current  
0.2  
40  
µA  
µA  
VBIAS operating  
current  
IBIAS  
IOUT = 10 µA  
150  
IOUT = 1 mA to 800 mA  
TJ = 25 °C  
0.490  
0.487  
0.500  
0.500  
0.510  
0.512  
VADJ  
VADJ accuracy  
V
-40 °C < TJ < 125 °C  
VOUT = 0.5 V  
IOUT = 1 mA  
VOUT = 0.5 V  
VBIAS = 3.6 V  
1 V ≤ VIN ≤ 5.5 V  
VIN static line  
regulation  
0.002  
0.04  
0.01  
%/V  
%/V  
ΔVOUT  
IOUT = 100 mA  
VOUT = 0.5 V  
VBIAS static line  
regulation  
0.2  
VIN = 1.5 V  
2.7 V ≤ VBIAS ≤ 5.5 V  
Static load  
regulation  
ΔVOUT  
IOUT = 1 mA to 800 mA  
0.0002  
70  
0.001  
%/mA  
mV  
IOUT = 800 mA  
VBIAS = 3.6 V  
90  
VDROP  
Dropout voltage  
40 °C < TJ < 125 °C  
120  
10 Hz to 100 kHz  
IOUT = 10 mA  
Output noise  
voltage  
eN  
50  
80  
µVRMS  
VIN > VOUT + 0.5 V +/- VRIPPLE  
VRIPPLE = 0.1 V  
f = 100 Hz  
Supply voltage  
rejection  
SVR  
f = 10 kHz  
f = 1 MHz  
60  
50  
dB  
DocID026624 Rev 2  
7/21  
 
Electrical characteristics  
ST1L08  
Unit  
Symbol  
Parameter  
Test conditions  
IOUT = 0 mA  
Min.  
Typ.  
Max.  
35  
TJ = 25 °C  
IOUT = 500 mA  
TJ = 25 °C  
IGND  
Ground current  
40  
IOUT = 800 mA  
40  
150  
0.8  
1
µA  
A
40 °C < TJ < 125 °C  
Short-circuit  
current  
ISC  
VEN  
IEN  
RL = 0  
1.8  
Enable input  
logic low  
Enable input  
logic high  
1.3  
V
Enable pin  
input current  
VEN = 1.3 V  
Rising edge  
µA  
0.92*  
VOUT  
Power Good  
output  
threshold  
V
V
0.8*  
Falling edge  
PG (2)  
VOUT  
Power Good  
output voltage  
low  
Isink = 6 mA open drain output  
0.4  
Thermal  
shutdown  
165  
20  
TSHDN  
Hysteresis  
°C  
Notes:  
(1)Important: in any case VBIAS ≥ VOUT + 1.5 V.  
(2)Power Good feature is not available on the ST1L08PUR.  
8/21  
DocID026624 Rev 2  
 
ST1L08  
Electrical characteristics  
TJ = 25 °C, VIN = VOUT + 0.5 V, VBIAS = VOUT + 1.5 Va, CIN = CBIAS = 1 μF, COUT = 4.7 μF,  
VEN = VBIAS, unless otherwise specified.  
Symbol  
Parameter  
Test conditions  
Min.  
Typ.  
Max.  
Unit  
Operating input  
voltage  
VIN  
1
5.5  
V
Operating bias  
voltage (1)  
VBIAS  
VOUT  
IIN  
2.7  
0.5  
5.5  
4
V
V
Output voltage  
range  
VIN operating  
current  
4
10  
150  
µA  
µA  
VBIAS operating  
current  
IBIAS  
IOUT = 10 µA  
45  
IOUT = 1 mA to 800 mA  
TJ = 25 °C  
-2  
2
VOUT  
VOUT accuracy  
-40 °C < TJ < 125 °C  
-2.5  
2.5  
%
IOUT = 1 mA  
VIN static line  
regulation  
VBIAS = VOUT + 1.5 V  
VOUT + 0.5 V ≤ VIN ≤ 5.5 V  
0.003  
0.04  
0.015  
0.2  
%/V  
ΔVOUT  
IOUT = 100 mA  
VBIAS static line  
regulation  
VIN = VOUT + 0.5 V  
%/V  
VOUT + 1.5 V ≤ VBIAS ≤ 5.5 V  
Static load  
regulation  
ΔVOUT  
IOUT = 1 mA to 800 mA  
0.0005 0.0025 %/mA  
IOUT = 800 mA  
VBIAS = 4.8 V  
VOUT = 3.3 V  
100  
VDROP  
Dropout voltage  
mV  
40 °C < TJ < 125 °C  
150  
10 Hz to 100 kHz  
IOUT = 10 mA  
Output noise  
voltage  
eN  
200  
70  
µVRMS  
VOUT = 3.3 V  
VIN > VOUT + 0.5 V +/- VRIPPLE  
VRIPPLE = 0.1 V  
Supply voltage  
rejection  
f = 100 Hz  
f = 10 kHz  
f = 1 MHz  
SVR  
dB  
53  
30  
IOUT = 0 mA  
TJ = 25 °C  
40  
50  
IGND  
Ground current  
μA  
IOUT = 500 mA  
TJ = 25 °C  
a
Important: in any case V  
≥ V  
+ 1.5 V.  
BIAS  
OUT  
DocID026624 Rev 2  
9/21  
Electrical characteristics  
ST1L08  
Unit  
Symbol  
Parameter  
Test conditions  
IOUT = 800 mA,  
Min.  
Typ.  
Max.  
50  
150  
40 °C < TJ < 125 °C  
Short-circuit  
current  
ISC  
VEN  
IEN  
RL = 0  
1.8  
A
V
Enable input  
logic low  
0.8  
1
Enable input  
logic high  
1.3  
Enable pin input  
current  
VEN = 1.3 V  
Rising edge  
Falling edge  
μA  
V
0.92 *  
VOUT  
Power Good  
output threshold  
0.8 *  
VOUT  
PG  
Power Good  
output voltage  
low  
Isink = 6 mA open drain output  
0.4  
V
Thermal  
shutdown  
165  
20  
TSHDN  
°C  
Hysteresis  
Notes:  
(1)Important: in any case VBIAS ≥ VOUT + 1.5 V.  
10/21  
DocID026624 Rev 2  
ST1L08  
Application information  
6
Application information  
6.1  
Thermal and short-circuit protections  
The ST1L08 is self-protected from short-circuit condition and overtemperature. When the  
output load is higher than the one supported by the device, the output current increases  
until the limit of typically 1.8 A is reached, at this point the current is kept constant even  
when the load impedance is zero.  
Thermal protection acts when the junction temperature reaches 165 °C typical. At this point  
the output of the IC shuts down. As soon as the junction temperature falls below the  
thermal hysteresis value the device starts working again.  
In order to calculate the maximum power that the device can dissipate, keeping the junction  
temperature below the TOP, the following formula is used:  
Equation 1  
6.2  
Output voltage setting for ADJ version  
In the adjustable version, the output voltage can be set from 0.5 V up to 4 V, by connecting  
a resistor divider between the ADJ pin and the output, thus allowing remote voltage  
sensing.  
The resistor divider should be selected using the following equation:  
Equation 2  
The resistors to be used, should have values in the range from 10 kΩ to 100 kΩ.  
Lower values can also be suitable, but they increase current consumption.  
6.3  
6.4  
Bias pin voltage requirements  
The bias input is designed for low drop applications. The bias pin must be at least 2.7 V,  
and at least 1.5 V higher than the output, to ensure proper biasing to the N-channel power  
pass transistor.  
If VIN supply voltage meets these requirements, the bias pin can be tied to VIN.  
External capacitors requirements  
The regulator is designed to be stable with ultra low ESR ceramic capacitors on the input  
and the output. The suggested minimum value of the input, bias and output capacitors is  
1 μF. The input capacitor must be connected as closer as possible to the VIN terminal. The  
output capacitor must also be connected as closer as possible to the output pin.  
DocID026624 Rev 2  
11/21  
Typical characteristics  
ST1L08  
7
Typical characteristics  
TJ = 25 °C, VIN = 1.5 V, VBIAS = 3.6 V, VOUT = VADJ, CIN = CBIAS = 1 μF, COUT = 4.7 μF, VEN  
=
VBIAS, unless otherwise specified.  
Figure 4: Output voltage vs. temperature  
(adjustable, IOUT = 1 mA)  
Figure 5: Output voltage vs. temperature  
(fixed 3.3 V, IOUT = 1 mA)  
Figure 6: Output voltage vs. temperature  
(adjustable, IOUT = 800 mA)  
Figure 7: Output voltage vs.temperature  
(fixed 3.3 V, IOUT = 800 mA)  
Figure 9: VBIAS line regulation vs. temperature  
(adjustable)  
Figure 8: VIN line regulation vs. temperature  
(adjustable)  
12/21  
DocID026624 Rev 2  
ST1L08  
Typical characteristics  
Figure 10: Load regulation vs. temperature  
(adjustable)  
Figure 11: Ground current vs. temperature  
(adjustable, IOUT = 0 mA)  
Figure 12: Ground current vs. temperature  
(adjustable, IOUT = 500 mA)  
Figure 13: Ground current vs. temperature  
(adjustable, IOUT = 800 mA)  
Figure 14: Ground current in off mode vs.  
temperature (adjustable)  
Figure 15: Ground current vs. output current  
(adjustable)  
DocID026624 Rev 2  
13/21  
Typical characteristics  
Figure 16: Dropout voltage vs. temperature  
ST1L08  
Figure 17: Dropout voltage temperature  
(adjustable)  
(fixed 3.3 V)  
Figure 19: Supply voltage rejection vs.  
frequency  
Figure 18: Dropout voltage vs. output current  
Figure 20: Output noise spectral density  
Figure 21: Stability area vs. (COUT, ESR)  
14/21  
DocID026624 Rev 2  
ST1L08  
Typical characteristics  
Figure 23: VBIAS line transient  
Figure 22: VIN line transient  
Figure 24: Load transient, COUT = 4.7 μF  
Figure 25: Load transient, COUT =1 μF  
Figure 26: Enable transient, VBIAS before VIN  
Figure 27: Enable transient VIN before VBIAS  
DocID026624 Rev 2  
15/21  
Package information  
ST1L08  
8
Package information  
In order to meet environmental requirements, ST offers these devices in different grades of  
ECOPACK® packages, depending on their level of environmental compliance. ECOPACK®  
specifications, grade definitions and product status are available at: www.st.com.  
ECOPACK® is an ST trademark.  
8.1  
DFN8 (2x3 mm) package information  
Figure 28: DFN8 (2x3 mm) package outline  
16/21  
DocID026624 Rev 2  
ST1L08  
Package information  
Table 6: DFN8 (2x3 mm) mechanical data  
mm  
Dim.  
Min.  
0.80  
0.00  
0.18  
Typ.  
0.90  
0.02  
0.25  
0.10  
2.00  
3.00  
1.65  
1.80  
0.50  
0.40  
0.20  
Max.  
1.00  
0.05  
0.30  
A
A1  
b
c
D
E
D2  
E2  
e
1.50  
1.65  
1.75  
1.90  
L
0.30  
0.50  
K
Figure 29: DFN8 (2x3 mm) recommended footprint  
DocID026624 Rev 2  
17/21  
Package information  
ST1L08  
8.2  
DFN8 (2x3 mm) packing information  
Figure 30: DFN8 (2x3 mm) tape outline  
Figure 31: DFN8 (2x3 mm) reel outline  
18/21  
DocID026624 Rev 2  
ST1L08  
Package information  
Table 7: DFN8 (2x3 mm) tape and reel mechanical data  
mm  
Dim.  
Min.  
Typ.  
Max.  
180  
A
C
D
N
T
12.8  
20.2  
60  
13.2  
14.4  
DocID026624 Rev 2  
19/21  
Revision history  
ST1L08  
9
Revision history  
Table 8: Document revision history  
Date  
Revision Changes  
23-Oct-2014  
1
First release.  
Updated Table 5: "Electrical characteristics for the  
ST1L08 (adjustable)".  
16-Nov-2015  
2
Minor text changes.  
20/21  
DocID026624 Rev 2  
ST1L08  
IMPORTANT NOTICE PLEASE READ CAREFULLY  
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Information in this document supersedes and replaces information previously supplied in any prior versions of this document.  
© 2015 STMicroelectronics All rights reserved  
DocID026624 Rev 2  
21/21  

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