Datasheet
MAX8819A/MAX8819B/MAX8819C
PMIC with Integrated Chargers and Smart
Power Selector in a 4mm x 4mm TQFN
4 _______________________________________________________________________________________
ELECTRICAL CHARACTERISTICS (continued)
(DC, LX_ unconnected; V
EP
= V
GND
= 0V, V
BAT
= 4V, DLIM[1:2] = 00, EN123 = EN4 = low, V
FB1
= V
FB2
= V
FB3
= 1.1V, V
FB4
= 0.6V,
PV13 = PV2 = SYS, T
A
= -40°C to +85°C, capacitors as shown in Figure 1, R
CISET
= 3kΩ, unless otherwise noted.) (Note 3)
PARAMETER SYMBOL CONDITIONS MIN TYP MAX UNITS
Slew rate 333 mA/ms
Time from 0 to 500mA 1.5
Time from 0 to 100mA 0.3
Charger Soft-Start Time t
SS_CHG
Time from 100mA to 500mA 1.2
ms
Timer Accuracy +15 %
Timer Suspend Threshold
CISET voltage when the fast-charge timer
suspends; 300mV translates to 20% of the
maximum fast-charge current limit
250 300 350 mV
Timer Extend Threshold
CISET voltage when the fast-charge timer
extends; 750mV translates to 50% of the
maximum fast-charge current limit
700 750 800 mV
Prequalification Time t
PREQUAL
33 min
Fast-Charge Time t
FSTCHG
660 min
Top-Off Time t
TOPOFF
33 min
POWER SEQUENCING (Figures 6 and 7)
REG1, REG2, REG3 Soft-Start
Time
t
SS1
, t
SS2
,
t
SS3
2.6 ms
REG4 Soft-Start Time t
SS4
C
COMP4
= 0.022μF to GND 5 ms
REGULATOR THERMAL SHUTDOWN
Thermal Shutdown Temperature T
J
rising +165 °C
Thermal Shutdown Hysteresis 15 °C
REG1–SYNCHRONOUS STEP-DOWN CONVERTER
Input Voltage PV13 supplied from SYS V
SYS
V
MAX8819A/MAX8819B 400
Maximum Output Current
L = 4.7μH,
R
LSR
= 0.13Ω
(Note 6)
MAX8819C 550
mA
Short-Circuit Current L = 4.7μH, R
LSR
= 0.13Ω 600 mA
Short-Circuit Detection Threshold 230 mV
Short-Circuit Foldback Frequency f
OSC
/3 Hz
FB1 Voltage (Note 7) 0.997 1.01 1.028 V
Output Voltage Range 1V
SYS
V
T
A
= +25°C -50 -5 +50
FB1 Leakage Current V
FB1
= 1.01V
T
A
= +85°C -10
nA
Load Regulation I
OUT1
= 100mA to 300mA 1 %
Line Regulation (Note 9) 1 %/D
p-Channel On-Resistance V
PV13
= 4.0V, I
LX1
= 180mA 190 mΩ
n-Channel On-Resistance V
PV13
= 4.0V, I
LX1
= 180mA 250 mΩ
MAX8819A/MAX8819B 0.565 0.600 0.640
p-Channel Current-Limit
Threshold
MAX8819C 0.615 0.650 0.750
A