Mar 29-07 RevD SP6126: TSOT-6 PFET Buck Controller
2007 Sipex Corporation
2
These are stress ratings only, and functional operation of
the device at these ratings or any other above those
indicated in the operation sections of the specifications
below is not implied. Exposure to absolute maximum rating
conditions for extended periods of time may affect
reliability.
ABSOLUTE MAXIMUM RATINGS
Input Voltage….................................................-0.3V to 30V
Lx………………………………………………….…-2V to 30V
FB……………..................................................-0.3V to 5.5V
Storage Temperature..………………...……-65
°
C to 150
°
C
Junction Temperature...................................-40
°
C to 125
°
C
Lead Temperature (Soldering, 10 sec)….….………..300
°
C
ESD Rating……….….…1kV LX, 2kV all other nodes, HBM
ELECTRICAL SPECIFICATIONS
Specifications
are for T
AMB
=T
J
=25
°
C, and those denoted by
apply over the full operating range, -40
°
C< T
j
<85
°
C. Unless
otherwise specified: V
IN
=4.5V to 29V, C
IN
= 4.7
μ
F.
PARAMETER
MIN
TYP
MAX
UNITS
CONDITIONS
0
°
C< T
j
<85
°
C
0
°
C< T
j
<85
°
C
0
°
C< T
j
<85
°
C
UVLO Turn-On Threshold
4.2
4.35
4.5
V
UVLO Turn-Off Threshold
4.0
4.2
4.4
V
UVLO Hysterisis
0.2
V
Operating
Range
Operating
Range
Input
Voltage
4.5
29
V
Input
Voltage
7
29
V
Operating VCC Current
0.3
3
mA
VFB=1.2V
Reference Voltage Accuracy
0.5
1
%
Reference Voltage Accuracy
0.5
2
%
Reference Voltage
0.594
0.6
0.606
V
Reference Voltage
0.588
0.6
0.612
V
Switching Frequency
Peak-to-peak ramp Modulator
510
600
V
IN
/5
690
kHz
V
Minimum ON-Time Duration
40
100
ns
Minimum Duty Cycle
Maximum Duty Cycle
Gate
Driver
Resistance
Gate
Driver
Resistance
Gate
Resistance
0
%
%
Internal resistor between GATE and
V
IN
V
IN
=12V,
V
FB
=0.5V,
resistance between GATE and VDR
V
IN
=12V,
V
FB
=0.7V,
resistance between GATE and V
IN
100
Turn-Off
50
60
k
Pull-Down
4
8
Measure
Driver
Pull-up
3
6
Measure
V
IN
- VDR voltage difference
4.5
5.5
V
Measure V
IN
– VDR, V
IN
>7V
Overcurrent Threshold
270
300
330
mV
Measure V
IN
- LX
LX pin Input Current
OFF interval during hiccup
25
30
100
35
uA
ms
V
LX
= V
IN
VFB=0.58V,
V
IN
=4.5V and first GATE pulse
Soft start time
3
5
9
ms
measure
between
SHDN Threshold
0.9
1.0
1.1
V
Apply voltage to FB
SHDN Threshold Hysteresis
100
mV