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