RT9420 Datasheet, PDF (4/14 Pages) Richtek Technology Corporation – Host-Side Single Cell Lithium Battery Gauge

RT9420
Absolute Maximum Ratings (Note 1)
 Voltage on TEST Pin Relative to GND -------------------------------------------------------------------------------- −0.3V to 5.5V
 Voltage on VBAT Pin Relative to GND ------------------------------------------------------------------------------- −0.3V to 5.5V
 Voltage on All Other Pins Relative to GND -------------------------------------------------------------------------- −0.3V to 6V
 SCL, SDA, QS, ALERT to GND --------------------------------------------------------------------------------------- −0.3V to 5.5V
 VBAT to GND --------------------------------------------------------------------------------------------------------------- −0.3V to 5V
 Power Dissipation, P_D @ T_A = 25°C
WDFN-8L 2x3 -------------------------------------------------------------------------------------------------------------- 3.17W
 Package Thermal Resistance (Note 2)
WDFN-8L 2x3, θ_JA --------------------------------------------------------------------------------------------------------- 31.5°C/W
WDFN-8L 2x3, θ_JC --------------------------------------------------------------------------------------------------------- 7.5°C/W
 Lead Temperature (Soldering, 10 sec.) ------------------------------------------------------------------------------- 260°C
 Junction Temperature Range -------------------------------------------------------------------------------------------- 150°C
 Storage Temperature Range -------------------------------------------------------------------------------------------- −65°C to 150°C
Recommended Operating Conditions (Note 3)
 Supply Voltage, VDD ----------------------------------------------------------------------------------------------------- 2.5V to 4.5V
 Junction Temperature Range -------------------------------------------------------------------------------------------- −40°C to 125°C
 Ambient Temperature Range -------------------------------------------------------------------------------------------- −40°C to 85°C
Electrical Characteristics
(2.5V ≤ VDD ≤ 4.5V, TA = 25°C unless otherwise specified) (Note 4)
Parameter
Symbol
Test Conditions
Min Typ Max Unit
DC Section
Active Current
IACTIVE
-- 22 40 A
Sleep-Mode Current (Note 5) ISLEEP
VDD = 2.5V
-- 0.5 1
A
--
1
3
Time-Base Accuracy
tERR
TA = 20C to 70C (Note 4)
3.5 1 3.5 %
Voltage Measurement Error VGERR
VBAT = 4V
12.5 --
25 --
12.5
mV
25
VBAT Pin Input Impedance RVBAT
15 --
-- M
SCL, SDA, QS ^Logic-High
Input Voltage _Logic-Low
All voltage reference to GND
All voltage reference to GND
1.4 --
--
V
--
-- 0.5
SDA Output Logic-Low
VOL_SDA
IOL_SDA = 4mA, All voltage reference
to GND
--
-- 0.4 V
ALERT Output Logic-Low
VOL_ALERT
IOL_ALERT = 2mA, All voltage
reference to GND
--
-- 0.4 V
SCL, SDA Pull-Down Current IPD
VDD = 4.5V, VSCL = VSDA = 0.4V
-- 0.2 0.4 A
Bus Low Timeout
tSLEEP
(Note 6)
2
--
3
s
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DS9420-01 October 2014