CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
NOTE:
4.
JA
is measured with the component mounted on a high effective thermal conductivity test board in free air. See Tech Brief TB379 for details.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: T
J
= T
C
= T
A
Electrical Specifications
V
DD
= V
IN
= V
EN
= 3.3V, C
1
= C
2
= 10µF, L = 1.8µH, V
O
= 1.8V (as shown in “Typical Application Diagram” on
page 1), T
A
= -40°C to +85°C unless otherwise specified.
Boldface limits apply over the operating
temperature range, -40°C to +85°C.
CONDITIONS
MIN
(Note 5)
TYP
MAX
(Note 5)
UNIT
PARAMETER
DC CHARACTERISTICS
V
FB
I
FB
V
IN
, V
DD
V
IN,OFF
V
IN,ON
I
S
DESCRIPTION
Feedback Input Voltage
Feedback Input Current
Input Voltage
Minimum Voltage for Shutdown
Maximum Voltage for Start-up
Input Supply Quiescent Current
Active - PFM Mode
Active - PWM Mode
PWM Mode
790
800
810
100
mV
nA
V
V
V
2.5
V
IN
falling, T
A
= +25°C only
V
IN
rising, T
A
= +25°C only
2
2.2
5.5
2.2
2.4
V
SYNC
= 0V
V
SYNC
= 3.3V
PWM, V
IN
= V
DD
= 5V
EN = 0, V
IN
= V
DD
= 5V
120
6.5
400
0.1
70
45
1.2
145
7.5
500
3
100
75
µA
mA
µA
µA
m
m
A
°C
°C
I
DD
Supply Current
r
DS(ON)-PMOS
r
DS(ON)-NMOS
I
LMAX
T
OT,OFF
T
OT,ON
I
EN
, I
SYNC
V
EN1
, V
SYNC1
V
EN2
, V
SYNC2
V
PG
PMOS FET Resistance
NMOS FET Resistance
Current Limit
Over-temperature Threshold
Over-temperature Hysteresis
EN, SYNC Current
EN, SYNC Rising Threshold
EN, SYNC Falling Threshold
V
DD
= 5V, T
A
= +25°C
V
DD
= 5V, T
A
= +25°C
T rising
T falling
V
EN
, V
RSI
= 0V and 3.3V
V
DD
= 3.3V
V
DD
= 3.3V
0.8
-1
145
130
1
2.4
µA
V
V
Minimum V
FB
for PG, WRT Targeted V
FB
V
FB
rising
Value
V
FB
falling
PG Voltage Drop
I
SINK
= 3.3mA
95
86
35
70
%
%
mV
V
OLPG
AC CHARACTERISTICS
F
PWM
t
SS
NOTE:
5. Parameters with MIN and/or MAX limits are 100% tested at +25°C, unless otherwise specified. Temperature limits established by characterization
and are not production tested.
PWM Switching Frequency
Soft-start Time
1.25
1.4
650
1.6
MHz
µs
FN6191 Rev 6.00
October 18, 2010
Page 2 of 11
ISL8010
Pin Descriptions
PIN NUMBER
1
2
3
4
5
6
7
8
9
10
PIN NAME
SGND
PGND
LX
VIN
VDD
SYNC
EN
PG
VO
FB
Negative supply for the controller stage
Negative supply for the power stage
Inductor drive pin; high current digital output with average voltage equal to the regulator output voltage
Positive supply for the power stage
Power supply for the controller stage
SYNC input pin; when connected to HI, regulator runs at forced PWM mode; when connected to Low, auto
PFM/PWM mode; when connected to external sync signal, at external PWM frequency up to 12MHz
Enable
Power-Good open drain output
Output voltage sense
Voltage feedback input; connected to an external resistor divider between V
O
and SGND for variable
output
PIN FUNCTION
Block Diagram
100
0.1µF
C4
470pF
124k
V
DD
V
O
10pF
FB
5M
PWM
COMPARATOR
+
-
INDUCTOR SHORT
+
-
CURRENT
SENSE
V
IN
-
+
PWM
COMPENSATION
100k
SYNC
EN
10µF
SYNC
EN
SOFT-
START
CLOCK
RAMP
GENERATOR
PFM
ON-TIME
CONTROL
CONTROL
LOGIC
P-DRIVER
LX
1.8µH
1.8V
0mA TO 600mA
+
-
PWM
COMPARATOR
UNDER-
VOLTAGE
LOCKOUT
TEMPERATURE
SENSE
N-DRIVER
10µF
5V +
–
BANDGAP
REFERENCE
SGND
+
-
SYNCHRONOUS
RECTIFIER
PGND
100k
PG
PG
POWER
GOOD
FN6191 Rev 6.00
October 18, 2010
Page 3 of 11
ISL8010
Typical Performance Curves
100
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
45
40
1
10
I
O
(mA)
V
O
= 0.8V
V
O
= 1.2V
V
O
= 3.3V
V
O
= 2.5V
All waveforms are taken at V
IN
= 3.3V, V
O
= 1.8V, I
O
= 600mA with component values shown on
page 1 at room ambient temperature, unless otherwise noted.
100
90
80
EFFICIENCY (%)
70
60
50
40
30
20
V
IN
= 5V
100
600
10
0
1
10
I
O
(mA)
V
O
= 3.3V
V
O
= 2.5V
V
O
= 1.8V
V
O
= 1.5V
V
O
= 1.2V
V
O
= 1.0V
V
O
= 0.8V
V
IN
= 5V
100
600
V
O
= 1.8V
V
O
= 1.5V
V
O
= 1.0V
FIGURE 1.
EFFICIENCY vs
I
O
(PFM/PWM MODE)
FIGURE 2. EFFICIENCY vs I
O
(PWM MODE)
100
95
90
85
EFFICIENCY (%)
80
75
70
65
60
55
50
45
40
1
V
O
= 2.5V
V
O
= 1.8V
EFFICIENCY (%)
100
90
80
V
O
= 1.5V
V
O
= 1.2V
V
O
= 1.0V
V
O
= 0.8V
70
60
50
40
30
20
V
IN
= 3.3V
10
I
O
(mA)
100
600
10
0
1
10
I
O
(mA)
V
O
= 0.8V
V
IN
= 3.3V
100
600
V
O
= 2.5V
V
O
= 1.8V
V
O
= 1.5V
V
O
= 1.2V
V
O
= 1.0V
FIGURE 3. EFFICIENCY vs I
O
(PFM/FWM MODE)
FIGURE 4. EFFICIENCY vs I
O
(PWM MODE)
1.44
V
IN
= 5V I
O
= 600mA
1.42
1.40
F
S
(MHz)
V
IN
= 3.3V I
O
= 600mA
V
IN
= 5V I
O
= 0A
V
O
CHANGES (%)
0.1
0.0
-0.1
-0.2
-0.3
-0.4
-0.5
V
IN
= 5V
V
IN
= 3.3V
V
IN
= 3.3V I
O
= 0A
1.38
1.36
1.34
1.32
-50
0
50
T
A
(°C)
100
150
0
0.2
0.4
I
O
(A)
0.6
0.8
1.0
FIGURE 5. F
S
vs JUNCTION TEMPERATURE (PWM MODE)
FIGURE 6. LOAD REGULATIONS (PWM MODE)
FN6191 Rev 6.00
October 18, 2010
Page 4 of 11
ISL8010
Typical Performance Curves
0.1
0.0
V
O
CHANGES (%)
-0.1
-0.2
-0.3
-0.4
-0.5
-0.6
-0.7
-50
V
IN
= 5V I
O
= 600mA
0
50
T
J
(°C)
V
IN
= 3.3V I
O
= 600mA
V
IN
= 3.3V I
O
= 0A
All waveforms are taken at V
IN
= 3.3V, V
O
= 1.8V, I
O
= 600mA with component values shown on
page 1 at room ambient temperature, unless otherwise noted.
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