SMB119
PIN DESCRIPTIONS (Continued)
Pin
Number
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
PAD
Pin Name
VBATT
COMP1
CSH1
CSL1
FB1
DRVL1
DRVL2
FB2
CSH2
CSL2
COMP2
PCHSEQ2
LDOIN3
LDOOUT3
SW5
VIN5
DRVL5
FB5
COMP5
SHDN
SDA
SCL
nALERT
DRVGND
Pin Type
Power
Input
Input
Input
Input
Output
Output
Input
Input
Input
Input
Output
Power
Input/Output
Input/Output
Power
Output
Input
Input
Input
Input/Output
Input
Output
Ground
Pin Description
Power Input for Controller. Connect to +2.7V to +6.0V voltage
source
Boost converter 1 compensation pin. Connect to R/C compensation
network
Boost converter 1 current sense high. Connect to high side of sense
resistor
Boost converter 1 current sense low. Connect to low side of sense
resistor
Boost converter 1 feedback pin. Connect to external resistor divider
Boost converter 1 low-side drive. Connect to NFET gate
Boost converter 2 low-side drive. Connect to NFET gate
Boost converter 2 feedback pin. Connect to external resistor divider
Boost converter 2 current sense high. Connect to high side of sense
resistor
Boost converter 2 current sense low. Connect to low side of sense
resistor
Boost converter 2 compensation pin. Connect to R/C compensation
network
Boost converter 2 sequence. Connect to PFET gate for boost
channel on/off and sequencing. Must be tied to ground when
unused.
LDO Power Input. Connect to +2.7V to +6.0V to supply internal LDO
LDO Output/Feedback
Buck converter 5 switch pin. Connect to drains of NFET
Buck Converter 5 Power. Connect to +2.7V to +6.0V to supply
internal PFET
Buck converter 5 low-side drive. Connect to NFET gate
Buck converter 5 feedback pin. Connect directly to output
Buck converter 5 compensation pin. Connect to type 2 R/C
compensation network
Shutdown. Active high, disables all functions of the SMB119 for low
power operation. SHDN is bypassed when DOCK_DC is present.
I
2
C Data
I
2
C Clock
Fault Interrupt. Latched, open drain active low output. Flag for all
fault conditions (multiplexed)
Power Ground. Internally connect to under package pad. Connect
to isolated PCB ground plane/flood
Summit Microelectronics, Inc
5
SUMMIT [ SUMMIT MICROELECTRONICS, INC. ]
