MC34703 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
Manufacturer
MC34703 Datasheet PDF : 46 Pages
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PIN CONNECTIONS
PIN CONNECTIONS
1
2
3
4
5
6
7
8
9 10 11
12 13 14 15 16 17 18 19 20 21 22
SR
INV
33
23
BOOT
32
26
NC
(Heatsink Only)
COMP
24
30
VIN2
28
SW
27
SW
29
PGND
Figure 3. 34703 Pin Connections Bottom View
Table 1. 34703 Pin Definitions
A functional description of each pin can be found in the Functional Pin Description section beginning on page 15.
Pin Number Pin Name Pin Function Formal Name
Definition
1
VBST
Input
Boost Voltage
Input for internal boost regulator. The internal boost regulator provides
8 V (at up to 45 mA current) to supply the gate drive circuits for the
integrated power MOSFETs and the external N-channel power MOSFET
of the linear regulator.
2
EN2
Input
Enable Pin 2
Enable 2 Input. The combination of the logic state of the Enable 1 and
Enable 2 inputs determine operation mode and type of power sequencing
of the IC.
3
CLKSEL Input/Output Clock Selection This pin sets the CLKSYN pin either as an oscillator output or
synchronization input pin. The CLKSEL pin is also used for the I2C
address selection.
Analog Integrated Circuit Device Data
Freescale Semiconductor
34703
3
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