SP6126_07 Datasheet, PDF (2/14 Pages) Sipex Corporation – High-Voltage, Step Down Controller in TSOT6

ABSOLUTE MAXIMUM RATINGS
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.
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 TAMB=TJ=25°C, and those denoted by ♦ apply over the full operating range, -40°C< Tj <85°C. Unless
otherwise specified: VIN =4.5V to 29V, CIN = 4.7µF.
PARAMETER
♦ ^{MIN TYP MAX UNITS}
CONDITIONS
UVLO Turn-On Threshold
4.2 4.35 4.5
V
0°C< T_j <85°C
UVLO Turn-Off Threshold
4.0 4.2 4.4
V
0°C< T_j <85°C
UVLO Hysterisis
0.2
V
Operating
Range
Input
Voltage
4.5
Operating Input Voltage
Range
7
29
V
0°C< T_j <85°C
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
510 600 690 kHz
Peak-to-peak ramp Modulator
VIN/5
V
Minimum ON-Time Duration
40 100 ns _♦
Minimum Duty Cycle
0
%
Maximum Duty Cycle
100
%
Gate Driver
Resistance
Turn-Off
50 60
kΩ
Gate Driver
Resistance
Pull-Down
4
8
Ω
Gate
Driver
Resistance
Pull-up
3
6
Ω
Internal resistor between GATE and
VIN
VIN=12V, VFB=0.5V, Measure
resistance between GATE and VDR
VIN=12V, VFB=0.7V, Measure
resistance between GATE and VIN
VIN - VDR voltage difference
4.5
5.5
♦ ^V
Measure VIN – VDR, VIN>7V
Overcurrent Threshold
LX pin Input Current
OFF interval during hiccup
Soft start time
SHDN Threshold
SHDN Threshold Hysteresis
270 300 330
25 30 35
100
3
5
9
0.9 1.0 1.1
100
mV
Measure VIN - LX
uA
VLX = VIN
ms
ms
VFB=0.58V, measure between
VIN=4.5V and first GATE pulse
♦ ^V
Apply voltage to FB
mV
Mar 29-07 RevD
SP6126: TSOT-6 PFET Buck Controller
2
 2007 Sipex Corporation