LM25116MH/NOPB National Semiconductor, LM25116MH/NOPB Datasheet - Page 5

• Manufacturer Part Number: LM25116MH/NOPB
• Description: IC CTRLR SYNC BUCK 20TSSOP
• Manufacturer: National Semiconductor
• Series: PowerWise®r
• Type: Step-Down (Buck)r

Specifications of LM25116MH/NOPB

• Internal Switch(s): No
• Synchronous Rectifier: Yes
• Number Of Outputs: 1
• Voltage - Output: 1.22 ~ 36 V
• Current - Output: 20A
• Frequency - Switching: 200kHz, 535kHz
• Voltage - Input: 6 ~ 42 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 20-TSSOP Exposed Pad, 20-eTSSOP, 20-HTSSOP
• Primary Input Voltage: 42V
• No. Of Outputs: 1
• Output Voltage: 36V
• Output Current: 20A
• No. Of Pins: 20
• Operating Temperature Range: -40°C To +125°C
• Msl: MSL 1 - Unlimited
• Controller Type, Ic: Buck
• Rohs Compliant: Yes
• For Use With: LM25116EVAL - BOARD EVALUATION LM25116
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Power - Output: -
• Other names: *LM25116MH; *LM25116MH/NOPB; LM25116MH

Soft Start
Error Amplifier
PWM Comparators
Oscillator
Current Limit
RAMP Generator
Diode Emulation
LO Gate Driver
Symbol
V
t
t
V
HO(OFF)
ON(min)
CS(THX)
V
V
V
f
f
CS(TH)
I
A
I
f
SW1
SW2
I
I
OHL
OLL
REF
BW
OHL
R1
R2
OLL
OL
Parameter
SS Current Source
SS Diode Emulation Ramp Disable
Threshold
SS to FB Offset
SS Output Low Voltage
FB Reference Voltage
FB Input Bias Current
COMP Sink/Source Current
DC Gain
Unity Gain Bandwidth
Forced HO Off-time
Minimum HO On-time
Frequency 1
Frequency 2
RT output voltage
RT sync positive threshold
Cycle-by-cycle Sense Voltage
Threshold (CSG-CS)
Cycle-by-cycle Sense Voltage
Threshold (CSG-CS)
CS Bias Current
CS Bias Current
CSG Bias Current
Current Limit Fault Timer
RAMP Current 1
RAMP Current 2
VOUT Bias Current
RAMP Output Low Voltage
SW Zero Cross Threshold
DEMB Output Current
DEMB Output Current
DEMB Output Current
LO Low-state Output Voltage
LO High-state Output Voltage
LO Rise Time
LO Fall Time
Peak LO Source Current
Peak LO Sink Current
5
Conditions
SS = 0V
SS Rising
FB = 1.25V
Sinking 100µA, UVLO = 0V
Measured at FB pin, FB =
COMP
FB = 2V
VIN = 42V, C
RT = 16kΩ
RT = 5kΩ
VCCX = 0V, RAMP = 0V
VCCX = 5V, RAMP = 0V
CS = 42V
CS = 0V
CSG = 0V
R
clock cycles)
VIN = 40V, VOUT=10V
VIN = 10V, VOUT = 10V
VOUT = 36V
VIN = 40V, VOUT = 10V
DEMB = 0V, SS = 1.25V
DEMB =0V, SS = 2.8V
DEMB = 0V, SS = Regulated
by FB
I
I
V
C-load = 1000pF
C-load = 1000pF
V
V
LO
LO
LO
LO
LO
T
= 16kΩ, (200kHz), (256
= 100mA
= -100mA, V
= 0V
= VCC
RAMP
OHL
= 50pF
= V
CC
-
1.195
1.191
Min
320
180
480
105
150
3.0
1.6
94
21
28
45
-1
8
3
1.215
1.215
1.28
0.08
0.25
Typ
160
450
100
200
535
110
122
180
200
265
3.5
2.7
1.8
3.5
11
45
15
80
90
90
28
38
65
18
12
-6
3
3
1.231
1.239
Max
0.17
500
580
220
590
126
139
125
125
220
4.0
3.8
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14
35
48
85
1
Units
MHz
kHz
kHz
mV
mV
mA
mV
mV
mV
mV
ms
µA
nA
dB
µA
µA
µA
µA
µA
µA
µA
µA
µA
ns
ns
ns
ns
V
V
V
V
V
V
A
A