LTM4609 LINER [Linear Technology], LTM4609 Datasheet - Page 4

• Manufacturer Part Number: LTM4609
• Description: 36VIN, 34VOUT High Effi ciency Buck-Boost DC/DC ?Module
• Manufacturer: LINER [Linear Technology]

ELECTRICAL CHARACTERISTICS
LTM4609
temperature range, otherwise specifi cations are at T
SYMBOL
Control Section
V
V
I
V
V
V
I
V
DF
DF
t
RFBHI
Internal V
INTV
ΔV
V
ΔV
ΔV
Current Sensing Section
V
V
I
PGOOD
ΔV
ΔV
ΔV
V
I
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: The LTM4609E is guaranteed to meet performance specifi cations
from 0°C to 85°C. Specifi cations over the –40°C to 85°C operating
temperature range are assured by design, characterization and correlation
with statistical process controls. The LTM4609I is guaranteed over the full
–40°C to 85°C temperature range.
4
SS
FCB
ON(MIN, BUCK)
SENSE
PGOOD
FB
RUN
STBYMD(START)
STBYMD(KA)
FCB
BURST
EXTVCC
SENSE(MAX)
SENSE(MIN, BUCK)
PGL
(BOOST, MAX)
(BUCK, MAX)
LDO
EXTVCC(HYS)
EXTVCC
FBH
FBL
FB(HYS)
CC
/V
LDO
CC
Regulator
PARAMETER
Feedback Reference Voltage
RUN Pin ON/OFF Threshold
Soft-Start Charging Current
Start-Up Threshold
Keep-Active Power On Threshold
Forced Continuous Threshold
Forced Continuous Pin Current
Burst Inhibit (Constant Frequency)
Threshold
Maximum Duty Factor
Maximum Duty Factor
Minimum On-Time for Synchronous
Switch in Buck Operation
Resistor Between V
Internal V
Internal V
EXTV
EXTV
EXTV
Maximum Current Sense Threshold
Minimum Current Sense Threshold
Sense Pins Total Source Current
PGOOD Upper Threshold
PGOOD Lower Threshold
PGOOD Hysteresis
PGOOD Low Voltage
PGOOD Leakage Current
CC
CC
CC
Switchover Voltage
Switchover Hysteresis
Switch Drop Voltage
CC
CC
Voltage
Load Regulation
OUT
and V
FB
Pins
A
CONDITIONS
V
V
V
V
V
Measured at FCB Pin
% Switch M4 On
% Switch M1 On
Switch M1 (Note 6)
V
I
I
I
Boost Mode
Buck Mode
Discontinuous Mode
V
V
V
V
I
V
CC
CC
CC
PGOOD
COMP
RUN
STBYMD
STBYMD
FCB
IN
SENSE
FB
FB
FB
PGOOD
= 25°C, V
= 0mA to 20mA, V
= 20mA, V
= 20mA, V
> 7V, V
Rising
Falling
Returning
= 0.85V
= 2.2V
–
= 1.2V
The
= 2mA
= 5V
= V
Rising
Rising, V
EXTVCC
SENSE
l
IN
EXTVCC
EXTVCC
denotes the specifi cations which apply over the –40°C to 85°C
= 12V. Per typical application (front page) confi guration.
+
= 5V
RUN
= 0V
Note 3: See Application Note 100.
Note 4: The LTM4609 is tested in a feedback loop that servos V
specifi ed voltage and measures the resultant V
Note 5: Turn-on and turn-off time are measured using 10% and 90%
levels. Transition delay time is measured using 50% levels.
Note 6: 100% test at wafer level only.
Rising
= 6V
EXTVCC
= 0V
= 5V
l
l
l
l
l
0.792
0.76
–0.3
99.5
–5.5
MIN
–95
0.4
5.7
5.4
5.5
1
1
–130
–380
1.25
–0.2
–7.5
TYP
200
100
300
160
0.8
1.6
1.7
0.7
0.8
5.3
0.3
5.6
7.5
2.5
0.2
–6
FB
99
99
60
6
.
0.808
100.5
–150
MAX
0.84
–0.1
250
150
190
–10
2.2
5.5
6.3
0.3
10
2
1
COMP
UNITS
to a
4609fa
mV
mV
mV
mV
mV
kΩ
μA
μA
μA
μA
ns
%
%
%
%
%
%
V
V
V
V
V
V
V
V
V