Datasheet

MAX8660/MAX8660A/MAX8660B/MAX8661
High-Efficiency, Low-I
Q
, PMICs with Dynamic
Voltage Management for Mobile Applications
5
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)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
PWM Switching Frequency f
SW
1.9 2.0 2.1 MHz
REG1—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER (MAX8660, MAX8660A, MAX8660B only)
SET1 = IN, V
PV1
= 4.2V, load = 600mA 3.250 3.300 3.350
SET1 not connected, V
PV1
= 3.6V,
load = 600mA
2.955 3.000 3.045
V1 Voltage
Accuracy (MAX8860/MAX8860B)
V1
SET1 = AGND, V
PV1
= 3.6V, load = 600mA 2.807 2.850 2.893
V
SET1 = IN, V
PV1
= 4.2V, load = 600mA 2.463 2.500 2.538
SET1 not connected, V
PV1
= 3.6V,
load = 600mA
1.970 2.000 2.030
V 1 V ol tag e Accur acy ( M AX 8660A) V1
SET1 = AGND, V
PV1
= 3.6V, load = 600mA 1.773 1.800 1.827
V
V1 Load Regulation Load = 0 to 1200mA -1.5 %/A
V1 Line Regulation 0.15 %/V
SET1 Input Leakage Current 0.01 µA
Load = 800mA (Notes 3, 4) 150
V1 Dropout Voltage
Load = 1200mA (Notes 3, 4) 200
mV
p-Channel On-Resistance R
P1
0.12 Ω
n-Channel On-Resistance R
N1
0.15 Ω
p-Channel Current-Limit
Threshold
I
LIM1
1.5 1.8 2.2 A
n-Channel Zero-Crossing
Threshold
25 mA
n-Channel Negative Current Limit Forced-PWM mode only -975 mA
REG1 Maximum Output Current I
OUT1
2.6V ≤ V
PV1
≤ 6V (Note 5) 1.2 A
V1 Bias Current 5µA
T
A
= +25°C-2±0.03 +2
LX1 Leakage Current
V
PV1
= 6V, LX1 =
PG1 or PV1,
V
EN1
= 0V
T
A
= +85°C ±0.2
µA
Soft-Start Ramp Rate
(MAX8660/MAX8860B)
To V1 = 3.3V (total ramp time is 450µs for
all V1 output voltages)
5 7 9 mV/µs
Soft-Start Ramp Rate
(MAX8660A)
To V1 = 2.5V (total ramp time is 450µs for
all V1 output voltages)
3 5 7 mV/µs
V5 to V1 Enable Time t
VMHVSH1
Figure 6 350 µs
Internal Off-Discharge Resistance 650 Ω
Minimum Duty Cycle
Forced-PWM mode only, min duty cycle in
skip mode is 0%
16.7 %
Maximum Duty Cycle 100 %