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LTM4636 Datasheet(PDF) 3 Page - Linear Technology

Part # LTM4636
Description  Fixed Ratio High Power Inductorless (Charge Pump) DC/DC Controller
PDF  28 Pages
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTM4636 Datasheet(HTML) 3 Page - Linear Technology

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LTC7820
3
7820fc
For more information www.linear.com/LTC7820
ELECTRICAL CHARACTERISTICS
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Input/Output Voltage
VCC
IC Bias Voltage Range
6
72
V
VVHIGH_SENSE
VHIGH_SENSE Voltage Range
(Note 6)
0
72
V
VVLOW_SENSE
VLOW_SENSE Voltage Range
0
36
V
VVLOW
VLOW Voltage Range
(Note 5)
0
36
V
IQ
Input DC Supply Current
Shutdown
Normal Operation
VRUN = 0V
VRUN = 5V, No Switching
60
1.5
µA
mA
VUVLO
Undervoltage Lockout Threshold
VINTVCC Falling
VINTVCC Rising
4.85
5.05
V
V
Overcurrent Protection
IISENSE+
ISENSE+ Pin Current
ISENSE+ = ISENSE– = 24V
220
350
µA
Pre-Balance Phase, VHIGH_SENSE = 24V,
ISENSE+ = ISENSE– = 24V, VVLOW = 12V,
VVLOW_SENSE = 11V
93
mA
IISENSE–
ISENSE– Pin Current
l
–5
1
5
µA
VISENSE
Current Limit Threshold (VISNESE+ – VISENSE–)
l
45
50
55
mV
Gate Drivers
RG2,4
Pull-Up On-Resistance
Pull-Down On-Resistance
2.5
1.5
Ω
Ω
RG1,3
Pull-Up On-Resistance
Pull-Down On-Resistance
2.4
1.1
Ω
Ω
G1/G2 tD
G1 Off to G2 On Delay Time
G2 Off to G1 On Delay Time
(Note 4)
50
50
ns
ns
G3/G4 tD
G3 Off to G4 On Delay Time
G4 Off to G3 On Delay Time
(Note 4)
60
60
ns
ns
G1/G3 tD
G1 On to G3 On Delay Time
G3 Off to G1 Off Delay Time
(Note 4)
5
10
ns
ns
G2/G4 tD
G2 On to G4 On Delay Time
G4 Off to G2 Off Delay Time
(Note 4)
5
10
ns
ns
RUN Pin
VRUN
Run Pin On Threshold
VRUN Rising
l
1.1
1.22
1.35
V
VRUN,HYS
Run Pin On Hysteresis
80
mV
INTVCC Regulator
VINTVCC_VCC
INTVCC Voltage No Load
6V < VCC < 72V, VEXTVCC = 0V
5.4
5.6
5.9
V
INTVCC Load Regulation
ICC = 0 to 60mA, VEXTVCC = 0V
0.8
±2
%
VINTVCC_EXT
INTVCC Voltage No Load with EXTVCC
12V < VEXTVCC < 45V (Note 7)
5.4
5.6
5.9
V
INTVCC Load Regulation with EXTVCC
ICC = 0 to 50mA, VEXTVCC = 12V
0.5
±2
%
EXTVCC Switchover Voltage
VEXTVCC Ramping Positive (Note 9)
6.35
6.5
6.65
V
EXTVCC HYSTERESIS
400
mV
VHIGH_SENSE and VLOW_SENSE
RVHIGH_SENSE
VHIGH_SENSE to GND Resistance
1
MΩ
IVLOW_SENSE
VLOW_SENSE Pin Current
VCC = 51V, VLOW_SENSE = 45V
±1
±10
µA
The l denotes the specifications which apply over the specified operating
junction temperature range, otherwise specifications are at TA = 25°C (Note 2). VCC = 12V, VRUN = 5V, unless otherwise specified.



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