33702 Datasheet, PDF (2/24 Pages) Motorola, Inc – 3.0 A Switch-Mode Power Supply with Linear Regulator

Freescale Semiconductor, Inc.
V_VIINN11
VI_IN_N
V^VB^BSS^TT
VB_BDD
8.0V
Boost
Control
VVB_BS_STT
Power
Enable
Vref
V^VD^DD^DI^I
Vref ^Bandgap
Voltage
Vref
Reference
V^VDDDDII
Internal
Supply
VVD_DD_DII
V_BBSSTT
V^VD^DD^DII
V^VD^DD^DII
Linear
Regulator
Control
Vref
I-LlIiMm
EN1
EN2
RESET
RT
ADDR
Reset
Control
POR
Timer
I²C
Control
Reset
SysCon
INV
LFB
Thermal
Limit
Power
Sequencing
V^VL^LD^DOO PPWoRw.SSeeqq..
Power
Down _UVLO
Voltage Margining
WWat-cdhodgogTimTimerer
V^VO^OUU^TT
V^VBSSTT
Current
Limit
I²C
Control
V^VD^DDD^II
Buck
HS
SysCon
SoftSt
Buck
Control
Logic
&
LS
Driver
V^VDDDII
LDRV
CS
LDO
LFB
Q4 ^LCMP
VVB_BS_STT
BOOT
V_VIINN22
(2)
Q1
SW
(2)
Q2
SDA
SCL
I²C
Interface
Switcher
Oscillator
300kHz
Slope
Comp.
PWM
Comp.
+
-
Error
Amp.
To Reset
+ ^{0.8V Control}
-
PGND
(2)
INV
VOOUUTT
P^PW^oR^w.Seq.
Seq.
Q3 ^VOOUUTT
CLKSEL CLKSYN FREQ
(4)
PGND
Figure 1. 33702 Simplified Block Diagram
33702
2
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