600mA Voltage-Scaling Step-Down Converter
for RF Power Amplifiers with Bypass Switch
Electrical Characteristics
1
T
A
= -40°C to +85°C, unless otherwise noted. V
IN
= V
CC
= 3.6V; typical values are T
A
= 25°C.
Symbol
Description
Conditions
Min
Typ
Max
0.6
V
CC
= 5.5V
EN = Low to High, MODE/SYNC =
High, V
DAC
= 1.2V
Sync to 19.8MHz
2
1.6
V
SYNC
= GND or V
CC
-1.0
3
0.6
1.0
1.4
-1.0
150
19.8
1.0
AAT1171
Units
V
V
µA
µs
MHz
V
µA
V/V
PWM/Light Load/EN
V
EN(L)
Enable Threshold Low
V
EN(H)
Enable Threshold High
I
EN
Input Low Current
t
EN
SYNC
F
SYNC
V
SYNC(H)
V
SYNC(L)
I
SYNC
DAC Input
Gain
Turn-On Enable Response Time
Synchronization Frequency
SYNC High Level Threshold
SYNC Low Level Threshold
SYNC Low Current
Output Voltage/DAC Voltage
3
1. The AAT1171 is guaranteed to meet performance specifications over the -40°C to +85°C operating temperature range and is assured
by design, characterization, and correlation with statistical process controls.
2. Please contact Sales for other synchronization frequencies.
2. Please contact Sales for other output voltage/DAC voltage gains.
1171.2006.06.1.0
5
ANALOGICTECH [ ADVANCED ANALOGIC TECHNOLOGIES ]
