AAT1142 Datasheet, PDF (5/22 Pages) Advanced Analogic Technologies – 800mA Voltage-Scaling Step-Down Converter

AAT1142
800mA Voltage-Scaling Step-Down Converter
Electrical Characteristics¹
L = 2.2µH, C_IN = C_OUT = 10µF, V_IN = 3.6V, T_A = -40°C to +85°C, unless otherwise noted. Typical values are
at T_A = 25°C.
Symbol Description
EN/SET and MODE/SYNC
V_EN/SET(L)
V_EN/SET(H)
T_EN/SET(L)
T_EN/SET(H)
T_OFF
T_LATCH
I_EN/SET
Enable Threshold Low
Enable Threshold High
EN/SET Low Time
EN/SET High Time
EN/SET Timeout
EN/SET Latch Timeout
Input Low Current
V_MODE/SYNC(L) Enable Threshold Low
V_MODE/SYNC(H)
I_MODE/SYNC
Enable Threshold High
Input Low Current
Conditions
V_EN/SET < 0.6V
V_EN/SET > 1.4V
V_EN/SET < 0.6V
V_EN/SET > 1.4V
V_IN = V_FB = 5.5V
Min Typ Max Units
0.6 V
1.4
V
0.3
75 µs
50 75 µs
500 µs
500 µs
-1.0
1.0 µA
V_IN ×
0.4
V
V_IN ×
0.7
V
-1.0
1.0 µA
Characteristics of SDA and SCL Bus Lines
Parameter
SCL Clock Frequency
Hold Time for START Condition; After
this Period, the First Clock Pulse is
Generated
LOW Period of the SCL Clock
HIGH Period of the SCL Clock
Set-up Time for a Repeated START
Condition
Data in Hold Time
Data in Set-Up Time
Set-Up Time for STOP Condition
Bus Free Time Between a STOP and
START Condition
Input Low Level
Input High Level
Symbol
f_SCL
t_HD;STA
Standard Mode
Min
Max
100
4.0
Fast Mode
Min
Max
400
0.6
Units
kHz
µs
t_LOW
t_HIGH
t_SU;STA
t_HD;DAT
t_SU;DAT
t_SU;STO
t_BUF
V_IL
V_IH
4.7
1.3
µs
4.0
0.6
µs
4.7
0.6
µs
0
3.45
0
0.9
µs
350
350
ns
4.0
0.6
µs
4.7
1.3
µs
V_IN · 0.3
V_IN · 0.3
V
V_IN · 0.7
V_IN · 0.7
V
1. The AAT1142 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.
1142.2006.07.1.0
5