FAN53168MTC FAIRCHILD [Fairchild Semiconductor], FAN53168MTC Datasheet - Page 8

• Manufacturer Part Number: FAN53168MTC
• Description: 6-Bit VID Controlled 2-4 Phase DC-DC Controller
• Manufacturer: FAIRCHILD [Fairchild Semiconductor]

FAN53168
Typical Characteristics
Test Circuits
8
200kΩ
39k Ω
+12V
1k Ω
Test Circuit 1 – Current Sense Amplifier V
Test Circuit 2 – Output Voltage Positioning
+12V
1V
10kΩ
SEE EQUATION 1 FOR FREQUENCIES NOT ON THIS GRAPH
4
3
2
1
0
1V
∆V
0
TPC 1. Master Clock Frequency
200kΩ
50
100nF
100nF
100
RT VALUE – kΩ
18
17
16
19
28
8
9
28
18
17
16
19
VCC
FB
CSCOMP
CSSUM
COMP
CSREF
GND
150
VCC
CSCOMP
CSSUM
∆
CSREF
GND
V
FB
=
200
FB
∆
V
V
OS
=
CSA
80
=
250
mV
CSCOMP –
CSA
– FB
40
300
∆
OS
V
=
1V
0
mV
Test Circuit 3 – Closed Loop Output Voltage Accuracy
TPC 2. Supply Current vs. Master Clock Frequency
4.7nF
1.25V
5.3
5.2
5.1
5.0
4.9
4.8
4.7
4.6
0
VID4
VID3
VID2
VID1
VID0
VID5
T
4-PHASE OPERATION
250kΩ
A
1kΩ
= 25°C
0.5
MASTER CLOCK FREQUENCY – MHz
1.0
10
11
12
13
14
1 VID4
2
3
4
5
6
7
8
9
VID3
VID2
VID1
VID0
VID5
FBRTN
FB
COMP
PWRGD
EN
DELAY
RT
RAMPADJ
1.5
FAN53168
CSCOMP
2.0
CSSUM
CSREF
PWM1
PWM2
PWM3
PWM4
ILIMIT
SW1
SW2
SW3
SW4
GND
VCC
PRODUCT SPECIFICATION
2.5
28
27
26
25
24
23
22
21
20
19
18
17
16
15
250kΩ
3.0
20kΩ
REV. 1.0.0 6/9/03
3.5
100nF
4.0
+12V
1µF
100nF