Datasheet

MAX8660/MAX8660A/MAX8660B/MAX8661
High-Efficiency, Low-I
Q
, PMICs with Dynamic
Voltage Management for Mobile Applications
7
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
p-Channel Current-Limit Threshold I
LIM3
1.85 2.15 2.45 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 -0.8 A
REG3 Maximum Output Current I
OUT3
2.6V ≤ V
PV3
≤ 6V (Note 5) 1.6 A
V3 Bias Current 0.01 µA
T
A
= +25°C -2 +0.03 +2
LX3 Leakage Current
V
PV3
= 6V, LX3 = PG3 or
PV3, V
EN34
= 0V
T
A
= +85°C 0.24
µA
MAX8660/MAX8660A/MAX8661, R
RAMP
=
56kΩ to 1.4V
8
Soft-Start Ramp Rate
MAX8660B, R
RAMP
= 56kΩ to 1.15V 6.7
mV/µs
V3 Dynamic-Change Ramp Rate R
RAMP
= 56kΩ 10 mV/µs
MAX8660/MAX8660A/MAX8661, pow er i ng
up to 1.4V , Fi g ur e 6, R
RAM P
= 56kΩ
400
EN34 to V3 Enable Time t
PHLVTH3
MAX8660B, pow er i ng up to 1.15V , Fi g ur e 6,
R
RAM P
= 56kΩ
400
µs
Internal Off-Discharge Resistance 550 Ω
Minimum Duty Cycle
Forced-PWM mode only, min duty cycle in
skip mode is 0%
16.7 %
Maximum Duty Cycle 100 %
REG4—SYNCHRONOUS STEP-DOWN DC-DC CONVERTER
M AX 8660/M AX 8660A/M AX 8661 RE G4 d efaul t
outp ut vol tag e, V
P V 4
= 3.6V , l oad = 200m A
1.379 1.400 1.421
MAX8660B REG4 default output voltage,
V
PV4
= 3.6V, load = 200mA
1.133 1.150 1.167
V
V4 Output Voltage Accuracy V4
REG4 serial programmed from 0.9V to 1.8V,
load = 200mA (Note 6)
-1.5 +1.5 %
V4 Load Regulation Load = 0 to 400mA -40 mV/A
V4 Line Regulation (Note 7) 0.1 %/V
p-Channel On-Resistance R
P4
0.37 Ω
n-Channel On-Resistance R
N4
0.3 Ω
p-Channel Current-Limit Threshold I
LIM4
0.65 0.78 0.90 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 -975 mA
REG4 Maximum Output Current I
OUT4
2.6V ≤ V
PV4
≤ 6V (Note 5) 0.4 A
V4 Bias Current 0.01 µA
T
A
= +25°C-2±0.02 +2
LX4 Leakage Current
V
PV4
= 6V, LX4 = PG4 or
PV4, V
EN34
= 0V
T
A
= +85°C 0.12
µA
MAX8660/MAX8660A/MAX8661,
R
RAMP
= 56kΩ to 1.4V
8
Soft-Start Ramp Rate
MAX8660B, R
RAMP
= 56kΩ to 1.15V 6.7
mV/µs
V4 Dynamic-Change Ramp Rate R
RAMP
= 56kΩ 10 mV/µs