SP6127 Datasheet, PDF (2/12 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 <125°C. Unless
otherwise specified: VIN =4.5V to 29V, CIN = 4.7µF.
PARAMETER
♦ ^{MIN TYP MAX UNITS}
CONDITIONS
UVLO Turn-On Threshold
UVLO Turn-Off Threshold
UVLO Hysteresis
4.2 4.35 4.5
V
4.0 4.15 4.4
V
0.2
V
0°C< T_j <125°C
0°C< T_j <125°C
Operating Input Voltage Range 4.5
Operating Input Voltage Range
7
29
V
0°C< T_j <125°C
29
V_♦
Operating VCC Current
Reference Voltage Accuracy
Reference Voltage Accuracy
0.3
3
0.5
1
0.5
2
mA
VFB=1.2V
%
%_♦
Reference Voltage
0.594 0.6 0.606 V
Reference Voltage
♦ ^{0.588 0.6 0.612 V}
Switching Frequency
Peak-to-peak ramp Voltage
750 900 1050 kHz
VIN/5
V
Minimum ON-Pulse Duration
40 100 ns _♦
Minimum Duty Cycle
Maximum Duty Cycle
0
%
100
%
Gate Driver Turn-Off Resistance
50 60
kΩ
Gate Driver Pull-Down
Resistance
4
8
Ω
Gate Driver Pull-up Resistance
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
70
3
5
9
0.8 1.0 1.2
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
Jan28-08 RevE
SP6127 TSOT-6 PFET Buck Controller
Page 2
 2007 Exar Corporation