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參數(shù)資料
| 型號(hào)： | SP6121EB |
| 英文描述： | Demo Board Manual |
| 中文描述： | 演示板手冊(cè) |
| 文件頁(yè)數(shù)： | 2/16頁(yè) |
| 文件大?。?/td> | 358K |
| 代理商： | SP6121EB |
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Date: 5/25/04
SP6121 Low Voltage, Synchronous Step Down PWM Controller Copyright 2004 Sipex Corporation
2
PARAMETER
QUIESCENT CURRENT
MIN
TYP
MAX
UNITS CONDITIONS
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
Initial Accuracy
Error Amplifier Reference over
Line, Load and Temperature
OSCILLATOR & DELAY PATH
Internal Oscillator Frequency
Maximum Duty Cycle
Minimum Duty Cycle
Minimum PDRV Pulse Width
-
-
0.5
25
1.0
60
mA
μ
A
No Switching
COMP = 0V
600
35
35
3
100
μ
s
μ
A
μ
A
M
nA
15
15
65
65
V
FB
= 1.35V, COMP=0.8V, No Faults
V
FB
=1.15V, COMP=1.8V
1.238
1.225
1.250
1.250
1.262
1.275
V
V
Trimmed with Error Amp in Unity Gain
440
100
-
500
-
-
100
560
-
0
kHz
%
%
ns
COMP = 2V
COMP = 0.8V
V
> 4.5V, Ramp up COMP voltage
until PDRV starts switching
CURRENT LIMIT
Internal Current Limit Threshold
ISET Sink Current
Current Limit Threshold and
ISET Temperature Coefficient
Current Limit Time Constant
ISENSE Input Bias Current
SOFT START, SHUTDOWN, UVLO
Internal Soft Start Slew Rate
125
25
160
30
0.33
195
35
mV
μ
A
%/C
V
ISET
- V
ISENSE
, T
A
= 25
°
C
V
ISET
=5V, T
A
= 25
°
C
15
-
μ
s
nA
-
100
0.4
V/ms
Measured at COMP pin on the
transition from shutdown
COMP charging to PDRV switching
COMP = 0.5V, Fault Initiated
V
FB
= 1.3V
COMP = 0.5V, V
FB
=1.15V
Internal Soft Start Delay Time
COMP Discharge Current
COMP Clamp Voltage
COMP Clamp Current
1.5
300
0.7
100
ms
μ
A
V
μ
A
150
0.6
0.8
ELECTRICAL SPECIFICATIONS
Unless otherwise specified: 0
°
C < T
A
< 70
°
C, 3.0V < V
CC
< 5.5V, C
COMP
= 22nF, C
PDRV
= C
NDRV
= 3.3nF, V
FB
= 1.25V, I
SET
= I
SENSE
= V
CC
, GND=0V
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
All other pins ............................... -0.3V to V
CC
+0.3V
Peak Output Current < 10
μ
s
PDRV, NDRV....................................................... 2A
Storage Temperature ...................... -65
°
C to 150
°
C
Lead Temperature (Soldering, 10 sec) ..........300
°
C
ESD Rating ............................................... 2kV HBM
ABSOLUTE MAXIMUM RATINGS
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