Datasheet

MAX8660/MAX8660A/MAX8660B/MAX8661
High-Efficiency, Low-I
Q
, PMICs with Dynamic
Voltage Management for Mobile Applications
6
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
REG2—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
SET2 = IN, V
PV2
= 4.2V, load = 600mA 3.250 3.300 3.350
SET2 not connected, V
PV2
= 3.6V,
load = 600mA
2.463 2.500 2.538
V2 Voltage
Accuracy (MAX8660/MAX8860B)
V2
SET2 = AGND, V
PV2
= 3.6V, load = 600mA 1.773 1.800 1.827
V
SET2 = IN, V
PV2
= 4.2V, load = 600mA 2.463 2.500 2.538
SET2 not connected, V
PV2
= 3.6V,
load = 600mA
1.970 2.000 2.030
V2 Voltage Accuracy (MAX8660A) V2
SET2 = AGND, V
PV2
= 3.6V, load = 600mA 1.773 1.800 1.827
V
V2 Load Regulation Load = 0 to 900mA -1.7 %/A
V2 Line Regulation 0.15 %/V
SET2 Input Leakage Current 0.01 µA
V2 Dropout Voltage Load = 900mA (Notes 3, 4) 225 mV
p-Channel On-Resistance R
P2
0.18 Ω
n-Channel On-Resistance R
N2
0.15 Ω
p-Channel Current-Limit Threshold I
LIM2
1.10 1.30 1.50 A
n- C hannel Z er o C r ossi ng Thr eshol d 25 mA
n-Channel Negative Current Limit Forced-PWM mode only -800 mA
REG2 Maximum Output Current I
OUT2
2.6V ≤ V
PV2
≤ 6V (Note 5) 0.9 A
V2 Bias Current 5µA
T
A
= +25°C -2 ±0.03 +2
LX2 Leakage Current
V
PV2
= 6V,
LX2 = PG2 or PV2,
V
EN2
= 0V
T
A
= +85°C 0.2
µA
Soft-Start Ramp Rate
To V2 = 1.8V (total ramp time is 450µs for
all V2 output voltages)
2 4 6 mV/µs
V5 to V2 Enable Time t
VMHVSH2
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 %
REG3—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
MAX8860/MAX8660A/MAX8661 REG3
default output voltage, V
PV3
= 3.6V,
load = 600mA
1.379 1.400 1.421
MAX8860B REG3 default output voltage,
V
PV3
= 3.6V, load = 600mA
1.133 1.150 1.167
V
V3 Output Voltage Accuracy V3
REG3 serial programmed from 0.9V to 1.8V,
load = 600mA (Note 6)
-1.5 +1.5 %
V3 Load Regulation Load = 0 to 1600mA -17 mV/A
V3 Line Regulation (Note 7) 0.05 %/V
p-Channel On-Resistance R
P3
0.12 Ω
n-Channel On-Resistance R
N3
0.08 Ω