LTM4615 Datasheet, PDF (9/24 Pages) Linear Technology – Triple Output, Low Voltage DC/DC μModule Regulator

SIMPLIFIED BLOCK DIAGRAM
Switching Regulator Block Diagram
PGOOD
TRACK ^4.99k
SUPPLY
RUN/SS
C_SSEXT
TRACK
5.76k
COMP
R_SS
1M
C_SS
1000pF
INTERNAL
COMP
CONTROL, DRIVE
POWER FETS
4.7μF
6.3V
M1
L
C2
M2 _470pF
V_IN
R1
4.99k
V_OUT
4.7μF
6.3V
GND
LTM4615
V_IN
22μF ^{2.375V TO 5.5V}
6.3V
V_OUT
1.5V
4A
22μF
6.3V
s3
FB
R_FB
5.76k
SW
4615 F01a
VLDO Block Diagram
V_IN
1.14V TO 3.5V
LDO_IN
10μF
4.7μF
6.3V ^0.4V
GND3
EN3
ENABLE
5V BOOST
+
– _CONTROL
GND3
GND3
GND
POWER GOOD
BOOST3
4.7μF
GND3
LDO_OUT
4.7μF
LDO_RHI
6.3V
4.99k
GND3 _FB3
V_OUT
1V
10μF 1.5A
PGOOD3
R_FBLDO
3.32k
4615 F01b
10k
1V
Figure 1. Simplified LTM4615 Block Diagram of Each Switching Regulator Channel and the VLDO
DECOUPLING REQUIREMENTS T_A = 25°C. Use Figure 1 configuration for each channel.
SYMBOL
C_IN
C_OUT
LDO_IN
LDO_OUT
PARAMETER
External Input Capacitor Requirement
(V_IN = 2.375V to 5.5V, V_OUT = 1.5V)
External Output Capacitor Requirement
(V_IN = 2.375V to 5.5V, V_OUT = 1.5V)
LDO Input Capacitance
LDO Output Capacitance
CONDITIONS
I_OUT = 4A
I_OUT = 4A
I_OUT = 1A
I_OUT = 1A
MIN TYP MAX UNITS
22
μF
66
100
μF
4.7
10
μF
10
μF
4615f
9