FAN5182 Datasheet, PDF (4/18 Pages) Fairchild Semiconductor – Adjustable Output 1, 2, or 3-Phase Synchronous Buck Controller

Electrical Characteristics
V_CC = 12V, FBRTN = GND. ● Indicates specifications over operating ambient temperature range. (Note 1)
Parameter
Symbol
Conditions
Min. Typ. Max. Units
OSCILLATOR
Frequency Range
f _OSC
● _0.25
3
MHz
Frequency Variation
f _PHASE
R_T = 332kΩ, 3-phase ^● 155
200
245
kHz
T_A = 25°C, R_T = 154kΩ, 3-phase
400
T_A = 25°C, R_T = 100kΩ, 3-phase
600
Output Voltage
V _RT
R_T = 100kΩ to GND
2.0
V
RAMPADJ Output Voltage
V _RAMPADJ
RAMPADJ - FB - 2KΩ x I_RAMPADJ ^●
-50
(with I_RAMPADJ set to 20 µA)
+50
mV
RAMPADJ Input Current
Range (Note 2)
I_RAMPADJ
0
100
µA
VOLTAGE ERROR AMPLIFIER
Output Voltage Low
0.3
V
Output Voltage High
3.1
V
Accuracy
Input Bias Current
Line Regulation
FBRTN Current
Output Current
DC Gain (Note 2)
V _FB
I _FB
∆V_FB
I _FBRTN
I O(ERR)
Referenced to FBRTN
FB = 800mV
V_CC = 10V to 14V
FB forced to V_OUT - 3%
● ₇₈₄
800
816
mV
●
-4
±1
+4
µA
0.05
%
●
100
140
µA
500
µA
87
dB
Gain Bandwidth Product
(Note 2)
G_BW(ERR)
COMP = FB
20
MHz
Slew Rate (Note 2)
CURRENT SENSE AMPLIFIER
C_COMP = 10pF
10
V/µs
Offset Voltage
Input Bias Current
DC Gain (Note 2)
V_OS(CSA)
CSSUM-CSREF ( See Figure 1.) ^● -5.5
+5.5
mV
I _BIAS(CSSUM)
● _-50
+50
nA
70
dB
Gain Bandwidth Product
(Note 2)
GBW _(CSA)
10
MHz
Slew Rate (Note 2)
Input Common-Mode Range
Output Voltage Low
C_CSCOMP = 10pF
CSSUM & CSREF
10
V/µs
0
V _CC -2.5
V
0.1
V
Output Voltage High
Output Current
I _CSCOMP
CURRENT BALANCE CIRCUIT
V _CC -2.5
V
500
µA
Common-Mode Range
(Note 2)
V_SW(X)CM
-600
+200
mV
Input Resistance
R _SW(X)
Input Current
I _SW(X)
Input Current Matching
∆I_SW(X)
CURRENT LIMIT COMPARATOR
SW(X) = 0V
SW(X) = 0V
SW(X) = 0V
●
20
30
40
kΩ
●
4
7
10
µA
●
-7
+7
%
Output Voltage: Normal Mode
Output Voltage: Shutdown
Mode
V _ILIMIT(NM)
V_ILIMIT(SD)
EN > 2V, R_ILIMIT = 250kΩ
EN < 0.8V, I_ILIMIT = -100µA
● _2.9
3
3.1
V
●
400
mV
Output Current: Normal Mode I_ILIMIT(NM)
EN > 2V, R_ILIMIT = 250kΩ
12
µA
Maximum Output Current
●
60
µA
4
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FAN5182 Rev. 1.0.1