E-L6911C STMicroelectronics, E-L6911C Datasheet - Page 18

• Manufacturer Part Number: E-L6911C
• Description: IC CTRLR 5BIT PROGR STPDN 20SOIC
• Manufacturer: STMicroelectronics
• Type: Step-Down (Buck)r

Specifications of E-L6911C

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.3 ~ 3.5 V
• Current - Output: 1.3A
• Frequency - Switching: 200kHz
• Voltage - Input: 5 ~ 12 V
• Operating Temperature: -40°C ~ 150°C
• Mounting Type: Surface Mount
• Package / Case: 20-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

L6911C
Application Circuit Examples
Figure 16 reports the schematic circuit for a motherboard chipset power supply. This application works from a
single 5V power supply and is able to deliver up to 10A with a 300KHz switching frequency.
Figure 16. Motherboard chipset power supply; 2.5Vout, 10A
18/20
+5 VIN
GNDIN
10A fuse
100nF
100n
CoilCraft DO3316P
1uH
43k
1N4148
G ND
V ID0
V ID1
V ID2
V ID3
V ID4
V C C
O SC
S S
18
11
4
5
6
7
8
3
20
15
9
L6911C
680pF
220pF
U1
100k
750k
19
10
14
13
17
16
12
2
1
5.6n
O CS E T
U GA TE
P H AS E
LG ATE
P GN D
P GO OD
V S EN
10k
100n
220
STS12NF30L
STS12NF30L
1n
1k
STPS3L25U
CoilCraft DO5022P
ceram ic
2x1uF
1.5uH
3x220uF
Sanyo
10k
Sanyo TPB
5x470uF
VOUTCORE
GNDCORE
PWRGD