參數(shù)資料
型號: MC33680FTBR2
廠商: ON SEMICONDUCTOR
元件分類: 穩(wěn)壓器
英文描述: Dual DC-DC Regulator for Electronic Organizer
中文描述: 1.15 A DUAL SWITCHING CONTROLLER, 100 kHz SWITCHING FREQ-MAX, PQFP32
封裝: PLASTIC, LQFP-32
文件頁數(shù): 2/16頁
文件大?。?/td> 340K
代理商: MC33680FTBR2
MC33680
http://onsemi.com
2
Figure 1. Detailed Application Block Diagram
+ve Edge Delay
R
S
Q
R
S
Q
Qb
1–SHOT
VBAT
Voltage
Reference
Main Regulator
with Synchronous Rectifier
Voltage Reference
Current Bias
& Supervisory
AGND
1.22 V
0.5 V
x2
VCOMP
for Mn. OFF Time
ILIM
DGND
VDD
L1
33 H
CMAIN
100 F
VMAINGND
DGND
VDD
M1
M2
senseFET
ZLC
for Max. ON Time
COMP2
COMP3
COMP1
VMAIN
+
30
32
Power–On
Reset
Lithium
Battery
Backup
RIref
480 k
8
IREF 7
AGND
6
VREF
5
PDELAY
4
VDD
+
+
3
5
VBAT 2
VBAT
1
VMAINFB
VBAT
VBAT
+ve Edge Delay
R
S
Q
Qb
1–SHOT
for Mn. OFF Time
AGND
ILIM
VAUXEMR
Q1
senseBJT
for Max. ON Time
COMP2
+
26
AGND
VBAT
VAUXSW
25
LIBATOUT
28
LIBATIN
27
VBAT
L2
33 H
Auxiliary Regulator
20
VAUXFBN
18
VAUXFBP
17
VAUXEN
21
VAUXBDV
23
VAUXBASE
22
VAUXCHG
200 k
RAUXa
2200 k
RAUXb
VCOMP
15
14
13
12
DGND
LIBATCL
LIBATON
LOWBATB
0.85 V,
1.1 V
CAUX
30 F
MBRA140T3
11
PORB
10
DGND
9
300 k
RLBa
900 k
RLBb
LOBAT–
SEN
CPOR
80 nF
CVDD
20 F
CMAINb
100 pF
RMAINb
1000 k
MBRA130LT1
31
VMAINSW
COMP1
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