Kingbor Technology Co.,Ltd
TEL:(86)0755-26508846 FAX:(86)0755-26509052
KB3511
ELECTRICAL CHARACTERISTICS
The
●
denotes specifications which apply over the full operating temperature range, otherwise specifications are T
A
= 25°C.
V
IN
= 3.6V unless otherwise specified.
SYMBOL
POR
PARAMETER
Power-On Reset Threshold
Power-On Reset On-Resistance
Power-On Reset Delay
V
RUN
I
RUN
RUN Threshold High
RUN Leakage Current
●
●
CONDITIONS
V
FB
Ramping Up, MODE/SYNC = 0V
V
FB
Ramping Down, MODE/SYNC = 0V
MIN
TYP
8.5
–8.5
100
262,144
MAX
UNITS
%
%
200
1.5
1
Ω
Cycles
V
µA
0.3
1
0.01
Note 1:
Absolute Maximum Ratings are those values beyond which the life
of a device may be impaired.
Note 2:
The KB3511 is guaranteed to meet specified performance from
0°C to 70°C. Specifications over the – 40°C and 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls.
Note 3:
The KB3511 is tested in a proprietary test mode that connects
V
FB
to the output of the error amplifier.
Note 4:
Dynamic supply current is higher due to the internal gate charge
being delivered at the switching frequency.
Note 5:
T
J
is calculated from the ambient T
A
and power dissipation P
D
according to the following formula: T
J
= T
A
+ (P
D
•
θ
JA
).
Note 6:
The DFN switch on-resistance is guaranteed by correlation to
wafer level measurements.
TYPICAL PERFORMANCE CHARACTERISTICS
Trickle Mode Operation
SW
5V/DIV
SW
5V/DIV
PWM Mode
V
OUT
200mV/DIV
Load Step
V
OUT
100mV/DIV
I
L
200mA/DIV
V
OUT
10mV/DIV
I
L
200mA/DIV
I
L
500mA/DIV
I
LOAD
500mA/DIV
V
IN
= 3.6V
4µs/DIV
V
OUT
= 1.8V
I
LOAD
= 50mA
CIRCUIT OF FIGURE 1
V
IN
= 3.6V
1µs/DIV
V
OUT
= 1.8V
I
LOAD
= 50mA
CIRCUIT OF FIGURE 1
V
IN
= 3.6V
20µs/DIV
V
OUT
= 1.8V
I
LOAD
= 50mA TO 600mA
CIRCUIT OF FIGURE 1
Efficiency vs Input Voltage
100
T
A
= 25°C
100mA
FREQUENCY (MHz)
Oscillator Frequency vs
Temperature
1.70
OSCILLATOR FREQUENCY (MHz)
Oscillator Frequency vs Supply
Voltage
1.8
T
A
= 25°C
1.7
1.6
1.5
1.4
1.3
1.2
95
90
EFFICIENCY (%)
1.65
10mA
1.60
1.55
1.50
1.45
1.40
1.35
6
1.30
–50 –25
50
25
75
0
TEMPERATURE (°C)
100
125
1mA
85
80
75
70
600mA
65 V
OUT
= 1.8V
CIRCUIT OF FIGURE 1
60
4
5
2
3
INPUT VOLTAGE (V)
2
3
4
SUPPLY VOLTAGE (V)
5
6
3
KINGBOR [ KINGBOR TECHNOLOGY CO ]
