YKW-06 Datasheet, PDF (3/5 Pages) Weltrend Semiconductor – Step-down Switching Controller

YKW-06
Preliminary release Rev. 0.30 20060118
RECOMMENDED OPERATING CONDITIONS
Parameter
Supply Voltage (VDD)
Storage temperature
Ambient temperature with power applied
Min. Typ. Max. Unit
2.4
5
6
V
-25 --- 125 ^oC
0
--- 70 ^oC
ELECTRICAL CHARACTERISTICS (AT Ta=25 , VDD=5V)
Parameter
Condition
VDD SUPPLY CURRENT
IDD normal supply current
EN=VDD, output no-load
IDD enable supply current
EN=0V
BUILT-IN OSCILLATOR
Internal Frequency
f
REFERENCE VOLTAGE
Internal reference voltage (Vref)
ERROR AMPLIFIER
DC gain
Gain bandwidth
Slew rate
SOFT-START FUNCTION
Source current (Iss)
Soft-start timing (Tss)
C2=0.01uF
OVER VOLTAGE PROTECTION AND DISABLE FUNTION
Threshold voltage (Vovp)
Vovp 1.0V,over voltage protection
Debounce time (Tovp)
15×( 1 / f )
OUTPUT DRIVER
Output source current
Voutb=4.6V
Output sink current
Voutb=0.4V
Rise time
Cload=1000pF
Fall time
Cload=1000pF
OUTPUT DUTY RATIO
Maximum duty ratio
Min.
---
---
---
1.16
---
---
---
---
---
0.9
70
---
---
---
---
82
Typ.
750
150
168
1.2
70
350
6
81
110
1.0
88
5
5
600
500
87
Max. Unit
--- uA
--- uA
--- KHz
1.24 V
--- dB
--- KHz
--- V/us
--- uA
--- us
1.1 V
105 us
--- mA
--- mA
--- ns
--- ns
92
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