High-side Power Switch ICs [Surface-mount, current monitor output function] SPF5018
External Dimensions (unit: mm)
Features
● Internal current sense resistor
● High accuracy current monitor output (sample & hold function)
● Built-in overcurrent and thermal protection circuits
12.2±0.2
+0.2
Conditions
VB
0 to 32
V
1
Vcc
–0.5 to 7.0
V
1.27±0.25
Power supply voltage 3
VB
0 to 40
V
Input terminal voltage
Vsense+
–0.8 to 6
Vsense–
Vsense+±Io • Rsense
V
VOUT
–2 to 32
V
–0.5 to 7.0
V
VPWM
2.0 –0.8
Unit
Power supply voltage 2
Output terminal voltage
9
(Ta=25ºC)
Ratings
Power supply voltage 1
Current sensing voltage
Fin
thickness
8
+0.15
0.4 –0.05
2.5±0.2
Symbol
1.0 –0.05
7.5±0.2
Absolute Maximum Ratings
Parameter
+0.1
10.5±0.2
16
VB terminal, t = 1 min
+0.15
0.25–0.05
VHold
Output current
IOUT
2.0
A
Power dissipation
PD
2.0
W
Storage temperature
Tstg
–40 to +150
°C
Channel temperature
Tch
150
°C
Block Diagram (for one channel)
Vcc
Depends on surface-mount board pattern
2
VB
11
clamp
Electrical Characteristics
D
Charge
Pump
OSC
TSD
(VB=14V, Ta=25ºC unless otherwise specified)
S
Sense
MOS
OCP
OUT
14
PWM
3
Parameter
Symbol
70kΩ
Ratings
min
typ
Sense+
max
Unit
13
CMOS Logic
Conditions
Hold
lamp
4
70kΩ
Min. operating power supply voltage
Operating power supply voltage 1
VB min
VB
Operating power supply voltage 2
VCC
Quiescent circuit current 1
Iqvb
Quiescent circuit current 2
PWM terminal input voltage
10
14
Hold terminal input voltage
Output ON resistance
Current sensing resistance
70
Vcc = 5V, VPWM = 0V
0.2
mA
Vcc = 5V, VPWM = 0V
V
110
Ttsd
150
Io
0.2
µA
Vcc = 5V, VPWM = 5V, Active H * 3
Ω
IOUT = 1A
0.21
Ω
IOUT = 1A, Ta = 125°C
0.21
Ω
IOUT = 1A
0.25
Ω
IOUT = 1A, Ta = 125°C
A
*4
A
*1
Io = 0A, Vcc = 5V
0.2
V
0.500
0.512
V
Io = 0.2A, Vcc = 5V
1.219
1.250
1.281
V
Io = 0.5A, Vcc = 5V, Ta = –40 to 140°C
2.925
3.000
3.075
V
5
mA
Io = 1A, Vcc = 5V, VSH = 0V
mA
Io = 1A, Vcc = 5V, VSH = 5V
–6
15
µs
t off
15
µs
tr
100
µs
tf
Current monitor output delay time
t shd
Hold time after inputting hold
t shh
S/H settling time
500
3
4
6
1kΩ
0.01
µF
11
VB
Sense+
Hold
Sense–
50
µs
650
µs
1
µs
2
µs
µs
VB = 11V, Vcc = 5V, Io = 1.2A,
C1 = 0.033µF
80
µs
VB = 11V, Vcc = 5V, Io = 1.2A,
C1 = 0.033µF, Ta = 125°C
t stt
D1
5.1
kΩ
LG
C
5
7
D2
Timing Chart
Ordinary operation
(auto hold)
Thermal
protection
Ordinary operation
(external hold)
VPWM
Icoil
*1
500 to 650
usec
Io = 0.5A, Vcc = 5V,
70
15
* Use a Schottky Di for D2 when the Sense+ terminal
is lower than the abs. max. rated voltage (–0.8V)
VS/H
C1 = 0.033µF
14
13
S/H
Vout
Io = 0.5A, Vcc = 5V
OUT
SFP5018
PWM
C1
Io = 1.2A, Vcc = 5V, Ta = –40 to 140°C
Note:
* 1: Accuracy warranty range for current monitor output
* 2: Equivalent errors are not included in current monitor output accuracy.
* 3: With built-in pull-down resistance (70kΩ typ)
* 4: Self-excitation and oscillation type
* 5: Accuracy of current monitor output is affected by the materials of the hold capacitor (C1).
The capacitor C1 must be of low dielectric absorption and have good bias and leak current characteristics.
48
Controlling
microcomputer
CPU
°C
1.2
t on
t sh
2
Vcc = 5V
0.488
ISH
Current monitor output hold time
*3
110
Rsense
Operation circuit for current monitor output
Output fall time
LG
Standard Connection Diagram
Vcc = 5V
Vcc = 5V, VPWM = 5V, Active H
7
C
0.14
RDSon
Thermal shutdown operating temperature
Output rise time
5
VCC
70
3.0
Output transfer time
*2
1.5
IHoldH
VSH
µA
V
Is
Current monitor output current
mA
Sense–
S/H
6
3.5
Overcurrent protection starting current
Current monitor output voltage
7.2
V
VHoldL
Hold terminal input current
V
15
S/H
1.5
IPWMH
VHoldH
16
*1
3.5
VPWML
PWM terminal input current
Minimum operation of OUT terminal.
5.0
Iqvcc
VPWMH
V
6
Sense
R
+
–
*2
*1
500 to 650
usec
VHold
Truth table
VPWM
L
H
VOUT
L
H
Overcurrent
protection
Ordinary operation
(auto hold)