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SP6123 Datasheet(PDF) 2 Page - Sipex Corporation

Part No. SP6123
Description  Low Voltage, Synchronous Step-Down PWM Controller Ideal for 2A to 10A, Small Footprint, DC-DC Power Converters
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Maker  SIPEX [Sipex Corporation]
Homepage  http://www.sipex.com
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SP6123 Datasheet(HTML) 2 Page - Sipex Corporation

 
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Date: 5/25/04
SP6123 Low Voltage, Synchronous Step Down PWM Controller
© Copyright 2004 Sipex Corporation
PARAMETER
MIN
TYP MAX
UNITS
CONDITIONS
QUIESCENT CURRENT
VCC Supply Current
0.5
1.0
mA
No Switching
VCC Supply Current (Disabled)
30
60
µA
COMP = 0V
ERROR AMPLIFIER
Error Amplifier Transconductance
0.6
mS
COMP Sink Current
15
35
60
µAVFB = 0.9V, COMP = 0.9V, No Faults
COMP Source Current
15
35
60
µAVFB = 0.7V, COMP = 2V
COMP Output Impedance
3
MΩ
VFB Input Bias Current
100
nA
Error Amplifier Reference
0.788 0.8
0.812
V
Trimmed with Error Amp in Unity Gain
OSCILLATOR & DELAY PATH
Internal Oscillator Frequency
270
300
330
kHz
SP6123
Internal Oscillator Frequency
450
500
550
kHz
SP6123A
Max. Controlled Duty Cycle
90
93
%
Minimum Duty Cycle
0
%
Comp=0.7V
Minimum GH Pulse Width
100
250
ns
VCC > 4.5V, Ramp up COMP voltage until
GH starts switching
CURRENT LIMIT
Internal Current Limit Threshold
160
200
240
mV
VCC - VSWN ; Temp = 25 °C;
VBST - VCC > 2.5V
Current Limit Threshold
0.34
%/C
Temperature Coefficient
Current Limit Time Constant
15
us
SOFT START, SHUTDOWN, UVLO
Internal Soft Start Slew Rate
SP6123A
0.35 0.60
0.95
V/ms
VFB = 0.7V and 0V, measure hiccup cycle
SP6123
0.1
0.3
0.6
V/ms
period
COMP Discharge Current
185
µA
COMP = 0.5V, Fault Initiated
COMP Clamp Voltage
0.55 0.65
0.75
V
VFB = 0.9V
COMP Clamp Current
10
30
65
µA
COMP = 0.5V, VFB = 0.9V
Shutdown Threshold Voltage
0.29 0.34
0.39
V
Measured at COMP Pin
Shutdown Input Pull-up Current
2
5
10
µA
COMP = 0.2V, Measured at COMP pin
VCC Start Threshold
2.63
2.8
2.95
V
VCC Stop Threshold
2.47
2.7
2.9
V
Unless otherwise specified: 0°C < TA < 70°C, 3.0V < VCC < 5.5V, CCOMP = 22nF, CGH = CGL = 3.3nF, VFB = 0.8V,
SWN = GND=0V, typical value for design guideline only.
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.
VCC ....................................................................................................... 7V
BST .................................................................. 13.2V
BST-SWN .............................................................. 7V
All other pins ................................ -0.3V to VCC + 0.3V
Peak Output Current < 10µs
GH,GL .................................................................. 2A
Storage Temperature ........................ -65°C to 150°C
Power Dissipation
Lead Temperature (Soldering, 10 sec) ............ 300°C
ESD Rating. ................................................ 2kV HBM
ELECTRICAL CHARACTERISTICS


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