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M7085 Datasheet, PDF (4/8 Pages) Unisonic Technologies – PFM STEP-DOWN DC-DC CONTROLLER
◁
M7085
CMOS IC
ABSOLUTE MAXIMUM RATING
PARAMETER
SYMBOL
RATINGS
UNIT
Input Voltage
VIN
-0.3 ~ 36
V
PGATE Voltage
VPGATE
-0.3 ~ 36
V
FB Voltage
VFB
-0.3 ~ 5
V
ISENSE Voltage
VISNS
-1.0 ~ 36
V
ADJ Voltage
Power Dissipation (TA =25Â¥)
VADJ
-0.3 ~ 36
V
PD
400
mW
Junction Temperature
TJ
150
Ċ
Storage Temperature
TSTG
-65 ~ +150
Ċ
Note: Absolute maximum ratings are those values beyond which the device could be permanently damaged.
Absolute maximum ratings are stress ratings only and functional device operation is not implied.
OPERATING RATINGS
PARAMETER
Supply Voltage
Operating Junction Temperature
SYMBOL
TOPR
RATINGS
4.5 ~ 35
-40 ~ +125
UNIT
V
Ċ
ELECTRICAL CHARACTERISTICS
VIN = 12V, VISNS = VIN − 1V, and VADJ = VIN − 1.1V, Ta=25Ċ
PARAMETER
SYMBOL
TEST CONDITIONS
Feedback Voltage (Note 1)
VFB
Minimum Driver Voltage
VPGATE(MIN)
VIN = 4.5V VFB = 1.0V
IGATE = 100µA sink
Comparator Hysteresis
VHYS
Current Limit Comparator Trip Voltage
VCL (Note2)
RADJ = 20Ω
RADJ = 160Ω
Current Limit Comparator Offset
VCL(OFF) VFB = 1.5V
Current Limit ADJ Current Source
FB pin Bias Current (Note 3)
ICL(ADJ)
IFB
VFB = 1.5V
VFB = 1.0V
Driver Output Current
Driver Resistance
Current Limit One Shot off Time
Minimum on Time in Normal Operation
IPGATE
RPGATE
TCL
TOPR(MIN)
Source
VIN = 7V, PGATE = 3.5V
Sink
VIN = 7V, PGATE = 3.5V
Source
ISOURCE = 100mA
Sink
ISINK = 100mA
VADJ = 11.5V
VISNS = 11.0V
VFB = 1.0V
VISNS = VADJ+0.1V
CLOAD on OUT = 1000Pf
(Note 4)
Minimum on Time in Current Limit
TCL(MIN)
VISNS = VADJ+0.1V
VFB = 1.0V CLOAD on
OUT = 1000pF (Note 4)
MIN TYP MAX UNIT
1.224 1.240 1.256
1.215
1.265
V
1.15
V
10
15
16
21
mV
110
880
mV
-20 0 +20 mV
3.0 5 7.0 µA
320 756 nA
0.4
A
0.3
5
Ω
8
5
8
13 µS
110
ns
185
ns
Feedback Voltage Line Regulation
%VFB/¶VIN 4.5 ≤ VIN ≤ 35V
0.010
%/V
Quiescent Current at Ground Pin
IQ
FB = 1.5V (Not Switching)
Note 1. The VFB is the trip voltage at the FB pin when PGATE switches from high to low.
2. VCL = ICL_ADJ * RADJ
3. Bias current flows out from the FB pin.
4. A 1000pF capacitor is connected between VIN and PGATE.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
300 500 µA
4 of 8
QW-R502-092,A
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