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SLVS676B – JUNE 2006 – REVISED OCTOBER 2006
ELECTRICAL CHARACTERISTICS (continued)
V
IN
= 3.6V, V
OUT
= 1.8V, EN = V
IN
, MODE = GND, L = 2.2µH, C
OUT
= 20µF, T
A
= –40°C to 85°C typical values are at T
A
=
25°C (unless otherwise noted)
PARAMETER
POWER SWITCH
R
DS(ON)
I
LK_PMOS
R
DS(ON)
I
LK_SW1/SW2
I
LIMF
P-Channel MOSFET On-resistance, V
IN
= V
GS
= 3.6V
Converter 1,2
P-Channel leakage current
N-Channel MOSFET On-resistance
Converter 1,2
V
DS
= 6.0V
V
IN
= V
GS
= 3.6V
200
6
0.85
1.19
Increasing junction temperature
Decreasing junction temperature
2.5V
≤
VIN
≤
6.0V
2.0
0.6
600
Voltage positioning active, MODE/DATA = GND,
device operating in PFM mode, VIN = 2.5V to
5.0V
(6) (7)
MODE/DATA = GND; device operating in PWM
Mode VIN = 2.5V to 6.0V
(7)
V
IN
= 2.5V to 6.0V, Mode/Data = V
IN
, Fixed PWM
operation, 0mA < I
OUT
< I
OUTMAX (8)
DC output voltage load regulation
t
Start up
t
Ramp
(4)
(5)
(6)
(7)
(8)
(9)
Start-up time
V
OUT
Ramp UP time
PWM operation mode
Activation time to start switching
(9)
Time to ramp from 5% to 95% of V
OUT
170
750
–1.5%
–1%
–1%
1.01x
V
OUT
0%
0%
2.5%
1%
1%
0.5
%/A
µs
µs
1.0
1.4
150
20
2.25
2.5
V
IN
280
620
1
450
7.5
1.15
1.61
°C
°C
MHz
V
mV
mΩ
µA
mΩ
µA
A
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Leakage Current into SW1/SW2 Pin Includes N-Chanel leakage currnet,
V
IN
= open, V
SW
= 6.0V, EN = GND
(4)
Forward Current
Limit PMOS and
NMOS
Thermal shutdown
Thermal shudown hysteresis
OUT1 600mA
OUT2 1000mA
2.5V
≤
V
IN
≤
6.0V
T
SD
OSCILLATOR
fSW
OUTPUT
V
OUT
V
ref
V
OUT (PFM)
DC output voltage accuracy PFM
mode, adjustable and fixed output
voltage
(5)
V
OUT
Adjustable output votage range
Reference voltage
Oscillator frequency
At pins SW1 and SW2 an internal resistor of 1MΩ is connected to GND
Output voltage specification does not include tolerance of external voltage programming resistors
Configuration L typ 2.2µH, C
OUT
typ 20µF, see parameter measurement information, the output voltage ripple depends on the effective
capacitance of the output capacitor, larger output capacitors lead to tighter output voltage tolerance
In Power Save Mode, PWM operation is typically entered at I
PSM
= V
IN
/32Ω.
For V
OUT
> 2.2V, V
IN
min = V
OUT
+0.3V
This time is valid if one converter turns from shutdown mode (EN2 = 0) to active mode (EN2 =1) AND the other converter is already
enabled (e.g., EN1 = 1). In case both converters are turned from shutdown mode (EN1 and EN2 = low) to active mode (EN1 and/or
EN2=1) a value of typ 80
µs
for ramp up of internal circuits needs to be added. After t
Start
the converter starts switching and ramps
V
OUT
.
4
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