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EL7554
Absolute Maximum Ratings (T A = +25°C)
V IN , V DD to SGND. . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +6.5V
VX to PGND. . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to V IN +0.3V
SGND to PGND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.3V to +0.3V
COMP, V REF , FB, V O , V TJ , TM,
SEL, PG, EN, STP, STN, C OSC to SGND . . . . . -0.3V to V DD +0.3V
Storage Temperature . . . . . . . . . . . . . . . . . . . . . . . .-65°C to +150°C
Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +125°C
Ambient Operating Temperature . . . . . . . . . . . . . . . .-40°C to +85°C
Pb-free reflow profile . . . . . . . . . . . . . . . . . . . . . . . . . .see link below
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may adversely impact product reliability and
result in failures not covered by warranty.
IMPORTANT NOTE: All parameters having Min/Max specifications are guaranteed. Typ values are for information purposes only. Unless otherwise noted, all tests are
at the specified temperature and are pulsed tests, therefore: T J = T C = T A
DC Electrical Specifications
V DD = V IN = 3.3V, T A = T J = +25°C, C OSC = 390pF, Unless Otherwise Specified
PARAMETER
V IN
V REF
DESCRIPTION
Input Voltage Range
Reference Accuracy
CONDITIONS
MIN
3
1.24
TYP
1.26
MAX
6
1.28
UNIT
V
V
V REFTC
Reference Temperature Coefficient
50
ppm/°C
V REFLOAD
V RAMP
Reference Load Regulation
Oscillator Ramp Amplitude
0 < I REF < 50μA
-1
1.15
%
V
I OSC_CHG
I OSC_DIS
Oscillator Charge Current
Oscillator Discharge Current
0.1V < V OSC < 1.25V
0.1V < V OSC < 1.25V
200
8
μA
mA
I VDD
I VDD_OFF
V DD_OFF
V DD_ON
V DD Supply Current
V DD Standby Current
V DD for Shutdown
V DD for Startup
V EN = 1 (L disconnected)
EN = 0
2
2.4
2.6
2.7
1
5
1.5
2.65
2.95
mA
mA
V
V
T OT
T HYS
Over-temperature Threshold
Over-temperature Hysteresis
135
20
°C
°C
I LEAK
I LMAX
Internal FET Leakage Current
Peak Current Limit
EN = 0, L X = 6V (low FET), L X = 0V (high FET)
6
10
μA
A
R DSON1
R DSONTC2
R DSONTC
PFET On Resistance
NFET On Resistance
R DSON Tempco
35
30
0.2
70
60
m Ω
m Ω
m Ω /°C
I STP
STP Pin Input Pull-down Current
V STP = V IN /2
-4
2.5
μA
I STN
V PGP
V PGN
STN Pin Input Pull-up Current
Positive Power Good Threshold
Negative Power Good Threshold
V STN = V IN /2
With respect to target output voltage
With respect to target output voltage
6
-14
2.5
4
14
-6
μA
%
%
V PG_HI
V PG_LO
V OVP
Power Good Drive High
Power Good Drive Low
Output Over-voltage Protection
I PG = 1mA
I PG = -1mA
2.6
10
0.5
V
V
%
V FB
V FB_LINE
GM EA
V FB_TC
Output Initial Accuracy
Output Line Regulation
Error Amplifier Transconductance
Output Temperature Stability
I LOAD = 0A
V IN = 3.3V, Δ V IN = 10%, I LOAD = 0A
V CC = 0.65V
0°C < T A < +85°C, I LOAD = 3A
0.79
85
0.8
0.2
125
±1
0.81
0.5
165
V
%
μs
%
F S
I FB
Switching Frequency
Feedback Input Pull-up Current
V FB = 0V
300
370
100
440
200
kHz
nA
3
FN7360.5
November 5, 2007
发布紧急采购，3分钟左右您将得到回复。
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