LTC3770EUH#TR Linear Technology, LTC3770EUH#TR Datasheet - Page 9

• Manufacturer Part Number: LTC3770EUH#TR
• Manufacturer: Linear Technology

Specifications of LTC3770EUH#TR

• Lead Free Status / RoHS Status: Not Compliant

PIN FUNCTIONS
V
pin to the output voltage makes the on-time proportional
to V
pin is grounded and defaults to 4.8V when the pin is tied
to INTV
PGOOD (Pin 32/Pin 3): Power Good Output. Open drain
FUNCTIONAL DIAGRAM
ON
OUT
(Pin 31/Pin 2): On-Time Voltage Input. Connecting this
. The comparator input defaults to 0.6V when the
CC
.
0.6V
REF
MARGIN0
MARGIN1
V
IN
MPGM
PLLIN
PLLFLTR
6
5
12
12K
PLL-SYNC
–
13
10
–
R4
9
1.18V
+
V
+
REFOUT
0.6V
V
RNG
1
R3
240k
V
2.0V
0.5V
(UH Package/G Package)
31
1
OUT
t
ON
4.8V
V
I
THB
ON
I
V
I
CMP
VON
ION
V
+
–
Q1
REFIN
= (10pF)
(0.5~2)
7
+
8
I
ON
Q2
20k
EA
+
3.3μA
R
ON
Q4
R
R
–
(UH Package)
R
Q6
R
S
+
–
V
3
INSNS
Q
15
I
REV
I
TH
80% • V
FOLDBACK
DISABLED
AT START-UP*
R
29 FCB
–
–
C
REFIN
SS
C
F
C1
0.6V
+
+
INTV
logic output that is pulled to ground when the output volt-
age is not within ±10% of the regulation point, after the
internal 25μs power bad mask timer expires.
Exposed Pad (Pin 33) UH Package: Signal Ground. Must
be soldered to the PCB ground for electrical contact and
optimum thermal performance.
0.25V
1.5V
CC
Z0
Z1
Z2
–
RUN 30
RUN
1μA
FCNT
RUN
ON
OV
28
17
18
+
THROUGH
SWITCH
SHOOT
LOGIC
ANTI-
AND
INTV
11
CC
REG
TRACK/SS
5V
OV
UV
1.4μA
–
+
–
+
SENSE
SENSE
PGOOD
BOOST
DRV
PGND
SW
C
27
TG
26
25
24
23
20
BG
21
22
32
C
VCC
SS
CC
+
–
14 V
10K
10K
90K
D
C
INTV
IN
B
B
SENSE
SENSE
+
*CONNECTION W/O
CC
SENSE RESISTOR
19
BG
C
+
–
IN
+
–
M1
M2
R
(OPTIONAL)*
SENSE
PGND
+
Z
SW
16
VIN
V
L1
SGND
IN
M2
V
2
4
FB
LTC3770
C
OUT
R2
R1
V
OUT
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