Datasheet

2
LTC3404
3404fb
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
I
VFB
Feedback Current (Note 4) ● 430 nA
V
FB
Regulated Output Voltage (Note 4) 0°C ≤ T
A
≤ 85°C 0.784 0.8 0.816 V
(Note 4) – 40°C ≤ T
A
≤ 85°C ● 0.74 0.8 0.84 V
ΔV
OVL
Output Overvoltage Lockout ΔV
OVL
= V
OVL
– V
FB
● 20 50 110 mV
ΔV
FB
Reference Voltage Line Regulation V
IN
= 2.65V to 6V (Note 4) 0.05 0.2 %/V
V
LOADREG
Output Voltage Load Regulation Measured in Servo Loop; V
ITH
= 0.9V to 1.2V ● 0.1 0.5 %
Measured in Servo Loop; V
ITH
= 1.6V to 1.2V ● – 0.1 – 0.5 %
V
IN
Input Voltage Range ● 2.65 6 V
I
Q
Input DC Bias Current (Note 5)
Pulse Skipping Mode 2.65V < V
IN
< 6V, V
SYNC/MODE
= 0V, I
OUT
= 0A 400 700 μA
Burst Mode Operation V
SYNC/MODE
= V
IN
, I
OUT
= 0A 10 15 μA
Shutdown V
RUN
= 0V, V
IN
= 6V 0 1 μA
f
OSC
Oscillator Frequency V
FB
= 0.8V ● 1.25 1.4 1.65 MHz
V
FB
= 0V 200 kHz
f
SYNC
SYNC Capture Range 1.0 1.7 MHz
I
PLL LPF
Phase Detector Output Current
Sinking Capability f
PLLIN
< f
OSC
● 6 20 40 μA
Sourcing Capability f
PLLIN
> f
OSC
● –6 –20 –40 μA
R
PFET
R
DS(ON)
of P-Channel MOSFET I
SW
= 100mA 0.5 0.7 Ω
R
NFET
R
DS(ON)
of N-Channel MOSFET I
SW
= –100mA 0.6 0.8 Ω
I
PK
Peak Inductor Current V
IN
= 3.3V, V
FB
= 0.7V, Duty Cycle < 35% 0.8 1.0 1.25 A
I
LSW
SW Leakage V
RUN
= 0V, V
SW
= 0V or 6V, V
IN
= 6V ±0.01 ±1 μA
V
SYNC/MODE
SYNC/MODE Threshold V
SYNC/MODE
Rising ● 0.3 1.0 1.5 V
I
SYNC/MODE
SYNC/MODE Leakage Current ±0.01 ±1 μA
V
RUN
RUN Threshold V
RUN
Rising ● 0.3 0.7 1.5 V
I
RUN
RUN Input Current ±0.01 ±1 μA
(Note 1)
Input Supply Voltage (V
IN
)...........................–0.3V to 7V
I
TH
, PLL LPF Voltage ................................–0.3V to 2.7V
RUN, V
FB
Voltages ...................................... – 0.3V to V
IN
SYNC/MODE Voltage .................................. – 0.3V to V
IN
SW Voltage (DC) .......................... –0.3V to (V
IN
+ 0.3V)
P-Channel MOSFET Source Current (DC) ........... 800mA
N-Channel MOSFET Sink Current (DC) ............... 800mA
Peak SW Sink and Source Current ........................ 1.5A
Operating Temperature Range (Note 2)
LTC3404E/LTC3404I ........................... –40°C to 85°C
LTC3404MP ...................................... –55°C to 125°C
Junction Temperature (Note 3)............................ 125°C
Storage Temperature Range ................. – 65°C to 150°C
Lead Temperature (Soldering, 10 sec).................. 300°C
The ● denotes specifications which apply over –40°C to 85°C, otherwise specifications are T
A
= 25°C.
V
IN
= 3.6V unless otherwise specified.
ABSOLUTE AXI U RATI GS
WWWU
PACKAGE/ORDER I FOR ATIO
UU
W
ELECTRICAL CHARACTERISTICS
1
2
3
4
8
7
6
5
TOP VIEW
MS8 PACKAGE
8-LEAD PLASTIC MSOP
PLL LPF
SYNC/MODE
V
IN
SW
RUN
I
TH
V
FB
GND
T
JMAX
= 125°C, θ
JA
= 125°C/W
ORDER PART NUMBER
MS8 PART MARKING
Consult LTC Marketing for parts specified with wider operating temperature ranges.
LTC3404EMS8
LTC3404IMS8
LTC3404MPMS8
LTKR
LTCJR
LTCXG
Order Options Tape and Reel: Add #TR
Lead Free: Add #PBF Lead Free Tape and Reel: Add #TRPBF
Lead Free Part Marking: http://www.linear.com/leadfree/