0.5A, 300kHz, SO-8 PWM/PFM Step Down Converter with Shutdown
Typical Performance Characteristics
General conditions for all curves: Circuit of figure 1; L = 20µH (Sumida, CD54), C
IN
= 47µF (tantalum) with 0.1µF (ceramic),
C
L
= 47µH (tantalum) MA735 (Matsushita) schottky diode, C
SS
= 4700pF (ceramic), T
A
= 25°C unless otherwise noted.
OUTPUT vs. AMBIENT TEMPERATURE
ILC6377SO-33
OUTPUT VOLTAGE: V
OUT1
, V
OUT2
(V)
3.40
3.40
SUPPLY CURRENT vs. AMBIENT TEMPERATURE
ILC6377SO-33
3.35
V
OUT1
3.30
V
OUT2
3.25
V
OUT1
SUPPLY CURRENT: I
DD
(µA)
40
60
80
3.35
3.30
3.25
3.20
-40
-20
0
20
3.20
-40
-20
0
20
40
60
80
AMBIENT TEMP.: Ta(°C)
AMBIENT TEMP.: Ta(°C)
STAND-BY CURRENT vs. AMBIENT TEMPERATURE
ILC6377SO-33
L
X
SWITCH RESISTANCE: R
SWON
(Ω)
3.40
L
X
ON RESISTANCE vs. AMBIENT TEMPERATURE
ILC6377SO-33
3.40
OUTPUT VOLATAGE: V
OUT
(V)
3.35
3.35
3.30
3.30
3.25
3.25
3.20
-40
-20
0
20
40
60
80
3.20
-40
-20
0
20
40
60
80
AMBIENT TEMP.: Ta(°C)
AMBIENT TEMP.: Ta(°C)
OSCILLATION FREQUENCY vs. AMBIENT TEMPERATURE
ILC6377SO-33
3.40
PFM DUTY RATIO vs. AMBIENT TEMPERATURE
ILC6377SO-33
3.40
OSCILLATION FREQUENCY: FOSC(kHz)
3.35
PFM DUTY RATIO: PFMDTY(%)
-40
-20
0
20
40
60
80
3.35
3.30
3.30
3.25
3.25
3.20
3.20
-40
-20
0
20
40
60
80
AMBIENT TEMP.: Ta(°C)
AMBIENT TEMP.: Ta(°C)
Impala Linear Corporation
ILC6377 1.3
(408) 574-3939
www.impalalinear.com
June 1999
9
IMPALA [ Impala Linear Corporation ]
