Datasheet

MAX8660/MAX8660A/MAX8660B/MAX8661
High-Efficiency, Low-I
Q
, PMICs with Dynamic
Voltage Management for Mobile Applications
10
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
I
2
C TIMING
Clock Frequency f
SCL
400 kHz
Hold Time (Repeated) START
Condition
t
HD
;
STA
Figure 8 0.6 µs
CLK Low Period t
LOW
1.3 µs
CLK High Period t
HIGH
0.6 µs
Set-Up Time for a Repeated
START Condition
t
SU;STA
Figure 8 0.6 µs
DATA Hold Time t
HD
;
DAT
Figure 9 0 µs
DATA Set-Up Time t
SU
;
DAT
Figure 9 100 ns
Set-Up Time for STOP Condition t
SU
;
STO
Figure 8 0.6 µs
Bus-Free Time Between STOP
and START
t
BUF
1.3 µs
Maximum Pulse Width of Spikes
that Must Be Suppressed by the
Input Filter of Both DATA and
CLK Signals
50 ns
ELECTRICAL CHARACTERISTICS (continued)
(V
IN
= V
IN5
= V
IN67
= V
IN8
= 3.6V, Figure 3, T
A
= -40°C to +85°C, unless otherwise noted. Typical values are at T
A
= +25°C.) (Note 2)
Note 2: Limits are 100% production tested at T
A
= +25°C. Limits over the operating temperature range are guaranteed through cor-
relation using statistical quality control (SQC) methods.
Note 3: The dropout voltage is defined as V
IN
- V
OUT
when V
OUT
is 100mV below the nominal value of V
OUT
.
Note 4: Dropout voltage (V
DO
) is a function of the p-channel switch resistance (R
P
) and the inductor resistance (R
L
).
The given values assume R
L
= 50mΩ for the REG1 inductor and 67mΩ for the REG2 inductor:
V
DO
= I
LOAD
(R
P
+ R
L
)
Note 5: The maximum output current is guaranteed by correlation to the p-channel current-limit threshold, p-channel on-resistance,
n-channel on-resistance, oscillator frequency, input voltage range, and output voltage range. The maximum output current
in the
Electrical Characteristics table is the worst-case output current for the components shown in Figure 3 over then entire
specified range of input and output voltage. More output current may be available when alternate components and voltage
ranges are used. See the Step-Down Converter Output Current section for more information.
Note 6: Tested at 1.4V default output voltage for the MAX8660, MAX8660A, and MAX8661. Tested at 1.15V default output voltage
for the MAX8660B.
Note 7: All output voltages are possible in normal mode. In forced-PWM mode, the minimum output voltage is limited by 0.167 x
V
IN
. For example, with V
IN
= 5.688V, the minimum output is 0.95V.