Datasheet

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     
SGLS243A − APRIL 2004 − REVISED JUNE 2008
7
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
absolute maximum ratings over operating free-air temperature (unless otherwise noted)
†
Supply voltages on pin V
IN
and FC (see Note 1) −0.3 V to 6 V. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Voltages on pins EN, ILIM, SYNC, PG, FB, L (see Note 1) −0.3 V to V
IN
+ 0.3 V. . . . . . . . . . . . . . . . . . . . . . . .
Peak switch current 1.6 A. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Continuous power dissipation See Dissipation Rating Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Operating junction temperature range, T
J
−40°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Storage temperature range, T
stg
−65°C to 150°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Lead temperature (soldering, 10 sec) 260°C. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
†
Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and
functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not
implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.
NOTE 1: All voltage values are with respect to network ground terminal.
DISSIPATION RATING TABLE
PACKAGE
T
A
≤ 25°C
POWER RATING
DERATING FACTOR
ABOVE T
A
= 25°C
T
A
= 70°C
POWER RATING
T
A
= 85°C
POWER RATING
10 pin MSOP 555 mW 5.56 mW/°C 305 mW 221 mW
NOTE: The thermal resistance junction to ambient of the 10-pin MSOP is 180°C/W. The device will not
run into thermal limitations, provided it is operated within the specified range.
recommended operating conditions
MIN TYP MAX UNIT
Supply voltage, V
I
2 5.5 V
Output voltage range for adjustable output voltage version, V
O
0.8 V
I
V
Output current for 3-cell operation, I
O
(V
I
≥ 2.5 V; L = 10 µH, f = 750 kHz) 600 mA
Output current for 2-cell operation, I
O
(V
I
≥ 2 V; L = 10 µH, f = 750 kHz) 200 mA
Inductor, L (see Note 2) 10 µH
Input capacitor, C
i
(see Note 2) 10 µF
Output capacitor, C
o
(see Note 2) V
O
≥ 1.8 V) 10 µF
Output capacitor, C
o
(see Note 2) V
O
< 1.8 V) 47 µF
Operating junction temperature, T
J
-40 125 °C
NOTE 2: See the Application Information section for further information.
electrical characteristics over recommended operating free-air temperature range, V
I
= 3.6 V,
V
O
= 2.5 V, I
O
= 300 mA, EN = V
IN
, ILIM = V
IN
, T
J
= −40°C to 125°C (unless otherwise noted)
supply current
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
I
Input voltage range
I
O
= 0 mA to 600 mA 2.5 5.5
V
V
I
Input voltage range
I
O
= 0 mA to 200 mA 2 5.5
V
I
(Q)
Operating quiescent current I
O
= 0 mA, SYNC = GND (PFM-mode enabled) 50 75 µA
I
(SD)
Shutdown current EN = GND 0.1 1 µA
enable
PARAMETER TEST CONDITIONS MIN TYP MAX UNIT
V
IH
EN high-level input voltage 1.3 V
V
IL
EN low level input voltage 0.4 V
I
lkg
EN input leakage current EN = GND or V
IN
0.01 0.1 µA
V
(UVLO)
Undervoltage lockout threshold 1.2 1.6 1.95 V