Datasheet

bq28400
www.ti.com SLUSA61A –OCTOBER 2010–REVISED DECEMBER 2010
RECOMMENDED OPERATING CONDITIONS
over operating free-air temperature range (unless otherwise noted)
PIN MIN NOM MAX UNIT
PACK V
BAT
+ 5
Supply voltage V
BAT 3.8 V
VC2
+ 5
V
(STARTUP)
Minimum startup voltage Start up voltage at PACK 5.2 5.5 V
VC1, BAT V
VC2
V
VC2
+ 5 V
VC2 V
VSRP
V
VSRP
+ 5 V
V
IN
Input Voltage Range VC1 – VC2 0 5 V
PACK 18.75 V
SRP to SRN –0.3 1 V
C
(REG27)
External 2.7 V REG capacitor 1 µF
T
OPR
Operating temperature –20 85 °C
ELECTRICAL CHARACTERISTICS
Typical values stated where T
A
= 25ºC and V
BAT
= V
PACK
= 7.2 V, Min/Max values stated where T
A
= –20ºC to 85ºC and V
BAT
= V
PACK
= 3.8 V to 18.75 V over operating free-air temperature range (unless otherwise noted)
PARAMETER TEST CONDITION
(1)
MIN TYP MAX UNIT
General Purpose I/O
High-level input 2 V
V
IH
SMBD, SMBC, PRES
voltage
Low-level input 0.8 V
V
IL
SMBD, SMBC, PRES
voltage
V
OH
Output voltage high PRES, I
L
= –0.5 mA V
REG27
– 0.5 V
V
BAT
= 3.8 V to 9 V, C
L
= 1 nF 3 V
BAT
– 0.3 8.6 V
V
OH(FUSE)
High level Fuse output
V
BAT
= 9 V to 10 V, C
L
= 1 nF 7.5 8 9
t
R(FUSE)
FUSE output rise time C
L
= 1 nF, V
OH(FUSE)
= 0 V to 5 V 10 µs
I
O(FUSE)
FUSE output current FUSE active –3 mA
FUSE output 2 6 kΩ
Z
O(FUSE)
impedance
FUSE Detect Input 0.8 2 3.2 V
V
FUSE_DET
Voltage
Low-level output 0.4 V
V
OL
SMBD, SMBC, TS1, I
L
= 7 mA
voltage
C
IN
Input capacitance 5 pF
I
(VOUT)
VOUT source currents V
O
active, V
O
= V
REG27
– 0.6 V –3 mA
I
LKG(VOUT)
VOUT leakage current V
O
inactive –0.2 0.2 µA
I
LKG
Input leakage current SMBD, SMBC, PRES, TS1 1 µA
SMBD and SMBC,
R
PD(SMBx)
T
A
= –20°C to 100°C 600 950 1300 kΩ
pull-down resistor
R
PAD
Pad resistance TS1 87 110 Ω
Supply Current
I
CC
Normal Mode No flash memory write, No I/O activity 400 µA
CPU=HALT
I
LPM
Low-Power Mode CHG=DSG=PCHG=OFF 55 µA
LDO ON but no load, no communication, BAT = 7.2 V
I
SHUTDOWN
Shutdown Mode T
A
= –20°C to 110°C 0.5 1 µA
REG27 Power On Reset
V
REG27IT–
Negative-going voltage input, at REG27 2.22 2.29 2.34 V
V
REG27IT+
Positive-going voltage input, at REG27 2.25 2.5 2.6 V
Flash
Data retention 10 Years
(1) By default: SMBus has internal pull-down.
Copyright © 2010, Texas Instruments Incorporated 5
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