MB3828 Fujitsu Microelectronics, Inc., MB3828 Datasheet - Page 3

• Manufacturer Part Number: MB3828
• Description: Pentium DC/DC Converter ic
• Manufacturer: Fujitsu Microelectronics, Inc.

Pin no.
PIN DESCRIPTION
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
1
2
3
4
5
6
7
8
9
RT
RS
SGND
CS
–IN
FB
ENB
OUT1
VS
CB
OUT2
PGND
VB
VD0
VD1
VD2
VD3
VD4
CTL
VSENSE
PWRGOOD
CSCP
V
VREF
CC
Symbol
I/O
—
—
—
—
—
—
—
—
—
—
O
O
O
O
O
I
I
I
I
I
I
I
I
I
Triangular wave frequency setting resistor connection pin
Discharging resistor connection pin for soft start capacitor
Ground pin
Soft start capacitor connection pin (Also used for discharge control)
Error amplifier inverted input pin
Error amplifier output pin
Discharge control function enable/disable switch control pin
Totem-pole output pin (External main-side FET gate drive)
External main-side FET source-side connection
Output bootstrap pin
Insert a capacitor between the CB and VS pins, to bootstrap the IC internal
output transistor.
Totem-pole output pin (External synchronous rectifier-side FET gate drive)
Ground pin
Output circuit power supply pin
5-bit digital input pin used to set DC/DC converter output voltage
5-bit digital input pin used to set DC/DC converter output voltage
5-bit digital input pin used to set DC/DC converter output voltage
5-bit digital input pin used to set DC/DC converter output voltage
5-bit digital input pin used to set DC/DC converter output voltage
Power supply control pin
The CTL pin is set to “L” level to place the IC in standby mode.
PWRGOOD circuit input pin
PWRGOOD output pin (open-drain output)
Outputs a “H” level signal when the output voltage is within the range from
VTLOW to VTHIGH.
Timer-latch short-circuit protection capacitor connection pin
Power supply pin for reference power and control circuit
Reference voltage output pin
Descriptions
MB3828
3