FAN5355 Fairchild Semiconductor, FAN5355 Datasheet - Page 7

• Manufacturer Part Number: FAN5355
• Description: The FAN5355 device is a high-frequency, ultra-fast transient response, synchronous step-down DC-DC converter optimized for low-power applications using small, low-cost inductors and capacitors
• Manufacturer: Fairchild Semiconductor

© 2008 Fairchild Semiconductor Corporation
FAN5355 • Rev. 1.1.0
Electrical Specifications
V
noted. Typical values are at T
6-Bit DAC
Timing
Soft Start
Note:
10. Option 03 and 06 slew rates are 35.5V/ms during the first 16s of soft start.
Symbol Parameter
IN
V
I
t
2
V(L-H)
= 3.6V, EN = V
SLEW
t
C
SS
EN
SYNC
VSEL
AVIN
SDA
SCL
Differential Nonlinearity
EN HIGH to I
V
Regulator
Enable to
Regulated V
Soft-start V
EN
OUT
LOW to HIGH Settling
IN
, VSEL = V
INTERFACE
OUT
AND LOGIC
3 MHz Osc
OUT
2
C Start
Slew Rate
I
A
2
C
Option 06
All Other
Options
= 25°C. Circuit and components according to Figure 1.
IN
, SYNC = GND, VSEL0(6) bit = 1, CONTROL2[4:3] = 00. T
(Continued)
(10)
Conditions
Monotonicity Assured by Design
R
1.5375V,
V
R
R
DAC
7-bit
OUT
LOAD
LOAD
LOAD
SOFT START
Figure 4. Block Diagram
Settled to within 2% of Set Point
= 75, Transition from 1.0 to
> 5, to V
> 5, to V
EN_REG
FPWM
REF
CLK
OUT
OUT
MODULATOR
7
= 1.8000V
= Power-up Default
Q1
Q2
Min.
A
250
= -40°C to +85°C, unless otherwise
PVIN
SW
PGND
VOUT
AGND
L
18.75
OUT
Typ.
170
140
7
C
C
IN
OUT
Max.
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VIN
210
180
0.8
VOUT
Units
V/ms
LSB
s
s
s
s