ltm4601ahv Linear Technology Corporation, ltm4601ahv Datasheet - Page 8

• Manufacturer Part Number: ltm4601ahv
• Description: 12a, 28vin Dc/dc ?module With Pll, Output Tracking And Margining
• Manufacturer: Linear Technology Corporation

PIN FUNCTIONS
LTM4601AHV
SGND (Pins H12, H11, G11): Signal Ground. These pins
connect to PGND at output capacitor point. See Figure 17.
COMP (Pin A11): Current Control Threshold and Error
Amplifi er Compensation Point. The current comparator
threshold increases with this control voltage. The voltage
ranges from 0V to 2.4V with 0.7V corresponding to zero
sense voltage (zero current).
PGOOD (Pins G12, F11): Output Voltage Power Good
Indicator. Open-drain logic output that is pulled to ground
when the output voltage is not within ±10% of the regula-
tion point, after a 25μs power bad mask timer expires.
SIMPLIFIED BLOCK DIAGRAM
8
C
19.1k
<0.9V = OFF
R
SS
MAX = 5V
>2V = ON
SET
TRACK/SS
V
OUT_LCL
PGOOD
MARG1
MARG0
INTV
MPGM
DRV
COMP
SGND
PLLIN
RUN
f
V
SET
CC
CC
FB
(See Package Description for Pin Assignment)
INTERNAL
COMP
39.2k
Figure 1. Simplifi ed LTM4601AHV Block Diagram
4.7μF
60.4k
50k
1M
POWER CONTROL
50k
50k
V
OUT
5.1V
ZENER
RUN (Pin A10): Run Control Pin. A voltage above 1.9V
will turn on the module, and when below 1V, will turn off
the module. A programmable UVLO function can be ac-
complished with a resistor from V
5.1V zener to ground. Maximum pin voltage is 5V. Limit
current into the RUN pin to less than 1mA.
V
bypass the remote sense amplifi er, or DIFFV
to this pin when remote sense amplifi er is used.
MTP1, MTP2, MPT3 (Pins C10, D10, D11 ): Extra Mounting
Pads with No Internal Connection. These pads are used
for increased solder integrity strength.
OUT_LCL
10k
(Pin L12): V
INTV
CC
–
+
Q1
Q2
10k
10k
22μF
OUT
1.5μF
10k
connects directly to this pin to
PGND
V
V
DIFFV
C
+
OSNS
OSNS
OUT
4601AHV F01
IN
OUT
+
–
+
C
to this pin that has a
IN
V
4.5V TO 28V
V
2.5V
12A
IN
OUT
OUT
connects
4601ahvf