ISL6251 Datasheet, PDF (4/20 Pages) Intersil Corporation – Low Cost Multi-Chemistry Battery Charger Controller

ISL6251, ISL6251A
Electrical Specifications
DCIN=CSIP=CSIN=18V, CSOP=CSON=12V, ACSET=1.5V, ACLIM=VREF, VADJ=Floating, EN=VDD=5V,
BOOT-PHASE=5.0V, GND=PGND=0V, C_VDD=1µF, I_VDD=0mA, T_A=-10°C to +100°C, T_J ≤ 125°C, unless
otherwise noted. (Continued)
PARAMETER
TEST CONDITIONS
MIN
TYP
MAX
UNITS
OSCILLATOR
Frequency
245
300
355
kHz
PWM Ramp Voltage (peak-peak)
CSIP=18V
1.6
V
CSIP=11V
1
V
SYNCHRONOUS BUCK REGULATOR
Maximum Duty Cycle
97
99
99.6
%
UGATE Pull-up Resistance
BOOT-PHASE=5V, 500mA source current
1.8
3.0
Ω
UGATE Source Current
BOOT-PHASE=5V, BOOT-UGATE=2.5V
1.0
A
UGATE Pull-down Resistance
BOOT-PHASE=5V, 500mA sink current
1.0
1.8
Ω
UGATE Sink Current
BOOT-PHASE=5V, UGATE-PHASE=2.5V
1.8
A
LGATE Pull-up Resistance
VDDP-PGND=5V, 500mA source current
1.8
3.0
Ω
LGATE Source Current
VDDP-PGND=5V, VDDP-LGATE=2.5V
1.0
A
LGATE Pull-down Resistance
VDDP-PGND=5V, 500mA sink current
1.0
1.8
Ω
LGATE Sink Current
VDDP-PGND=5V, LGATE=2.5V
1.8
A
CHARGING CURRENT SENSING AMPLIFIER
Input Common-Mode Range
0
18
V
Input Offset Voltage
Guarantee by design
-2.5
0
2.5
mV
Input Bias Current at CSOP
0 < CSOP < 18V
0.25
2
µA
Input Bias Current at CSON
0 < CSON < 18V
75
100
µA
CHLIM Input Voltage Range
0
3.6
V
CSOP to CSON Full-Scale Current
Sense Voltage
ISL6251: CHLIM=3.3V
ISL6251A, CHLIM=3.3V
157
165
173
mV
160
165
170
mV
ISL6251: CHLIM=2.0V
95
100
105
mV
ISL6251A: CHLIM=2.0V
97
100
103
mV
ISL6251: CHLIM=0.2V
5.0
10
15.0
mV
ISL6251A: CHLIM=0.2V
7.5
10
12.5
mV
CHLIM Input Bias Current
CHLIM=GND or 3.3V, DCIN=0V
-1
1
µA
CHLIM Power-Down Mode Threshold CHLIM rising
Voltage
80
88
95
mV
CHLIM Power-Down Mode Hysteresis
Voltage
15
25
40
mV
ADAPTER CURRENT SENSING AMPLIFIER
Input Common-Mode Range
7
25
V
Input Offset Voltage
Guarantee by design
-2
2
mV
Input Bias Current at CSIP & CSIN
Combined
CSIP=CSIN=25V
100
130
µA
Input Bias Current at CSIN
0 < CSIN < DCIN, Guaranteed by design
0.10
1
µA
4
FN9202.1
June 17, 2005