Datasheet

LTC3417A-2
3
3417a2fa
The l denotes the specifi cations which apply over the full operating
temperature range, otherwise specifi cations are at T
A
= 25°C. V
IN
= 3.6V unless otherwise specifi ed (Note 2).
ELECTRICAL CHARACTERISTICS
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
V
IN1
, V
IN2
Operating Voltage Range V
IN1
= V
IN2
2.25 5.5 V
I
FB1
, I
FB2
Feedback Pin Input Current V
IN
= 6V Pin Under Test = 3V ± 0.1 µA
V
FB1
, V
FB2
Feedback Voltage (Note 3)
l
0.784 0.8 0.816 V
ΔV
LINEREG
Reference Voltage Line Regulation. %/V
is the Percentage Change in V
OUT
with a
Change in V
IN
V
IN
= 2.25V to 5V (Note 3) 0.02 0.2 %/V
ΔV
LOADREG
Output Voltage Load Regulation I
TH1
, I
TH2
= 0.36V (Note 3)
I
TH1
, I
TH2
= 0.84V (Note 3)
0.02
–0.02
0.2
–0.2
%
%
g
m(EA)
Error Amplifi er Transconductance I
TH1
, I
TH2(PINLOAD)
= ±5µA (Note 3) 1400 µS
I
S
Input DC Supply Current (Note 4)
Active Mode V
FB1
= V
FB2
= 0.75V, V
SYNC/MODE
= V
IN
,
V
RUN1
= V
RUN2
= V
IN
400 600 µA
I
S
Half Active Mode (V
RUN2
= 0V, 1.5A Only) V
FB1
= 0.75V, V
SYNC/MODE
= V
IN
, V
RUN1
= V
IN
260 400 µA
Half Active Mode (V
RUN1
= 0V, 1A Only) V
FB2
= 0.75V, V
SYNC/MODE
= V
IN
, V
RUN2
= V
IN
260 400 µA
Both Channels in Sleep Mode V
FB1
= V
FB2
= 1V, V
SYNC/MODE
= V
IN
, V
RUN1
=
V
RUN2
= V
IN
125 250 µA
Shutdown V
RUN1
= V
RUN2
= 0V 0.01 1 µA
f
OSC
Oscillator Frequency V
FREQ
= V
IN
V
FREQ
: R
T
= 143k
V
FREQ
: Resistor (Note 6)
1.2
0.85
1.5
1
1.8
1.25
4
MHz
MHz
MHz
I
LIM1
Peak Switch Current Limit on SW1 (1.5A) 2.1 2.5 A
I
LIM2
Peak Switch Current Limit on SW2 (1A) 1.4 1.7 A
R
DS(ON)1
SW1 Top Switch On-Resistance (1.5A)
SW1 Bottom Switch On-Resistance
V
IN1
= 3.6V (Note 5)
V
IN1
= 3.6V (Note 5)
0.088
0.084


R
DS(ON)2
SW2 Top Switch On-Resistance (1A)
SW2 Bottom Switch On-Resistance
V
IN2
= 3.6V (Note 5)
V
IN2
= 3.6V (Note 5)
0.16
0.15


I
SW1(LKG)
Switch Leakage Current SW1 (1.5A) V
IN1
= 6V, V
ITH1
= 0V, V
RUN1
= 0V 0.01 1 µA
I
SW2(LKG)
Switch Leakage Current SW2 (1A) V
IN2
= 6V, V
ITH2
= 0V, V
RUN2
= 0V 0.01 1 µA
V
UVLO
Undervoltage Lockout Threshold V
IN1
, V
IN2
Ramping Down
V
IN1
, V
IN2
Ramping Up
1.9
1.95
2.07
2.12
2.2
2.25
V
V
T
PGOOD
Threshold for Power Good. Percentage
Deviation from V
FB
Steady State
(Typically 0.8V)
V
FB1
or V
FB2
Ramping Up
V
FB1
or V
FB2
Ramping Down
–6
–6
%
%
R
PGOOD
Power Good Pull-Down On-Resistance 120 300 
V
RUN1,
V
RUN2
RUN1, RUN2 Threshold 0.3 0.85 1.5 V
V
PHASE
PHASE Threshold High-CMOS Levels V
IN
–0.5 V
PHASE Threshold Low-CMOS Levels 0.5 V
I
RUN1,
I
RUN2,
I
PHASE,
I
SYNC/MODE
RUN1, RUN2, PHASE and SYNC/MODE
Leakage Current
V
IN
= 6V, Pin Under Test = 3V ±0.01 ±1 µA
VTL
SYNC/MODE
SYNC/MODE Threshold Voltage Low 0.5 V
VTH
SYNC/MODE
SYNC/MODE Threshold Voltage High V
IN
–0.5 V
VTH
FREQ
FREQ Threshold Voltage High V
IN
–0.5 V