BD9740KN-E2 Rohm Semiconductor, BD9740KN-E2 Datasheet - Page 3

• Manufacturer Part Number: BD9740KN-E2
• Description: IC SWITCH REG W/FET 48UQFN
• Manufacturer: Rohm Semiconductor
• Series: -r
• Type: Step-Down (Buck), Step-Up (Boost), Inverting, PWMr

Specifications of BD9740KN-E2

• Internal Switch(s): Yes
• Synchronous Rectifier: Yes
• Number Of Outputs: 7
• Voltage - Output: -
• Current - Output: 30mA
• Frequency - Switching: 100kHz ~ 1.2MHz
• Voltage - Input: 1.5 V ~ 10 V
• Operating Temperature: -20°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 48-VFQFN
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

●Electrical characteristics
BD9739KN,BD9740KN
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www.rohm.com
(Unless otherwise specified, Ta = 25℃, VBAT = 3 V, VCC = 5 V, RT = 11 k, CT = 180 pF, STB1 to STB7 = 3 V)
[Reference voltage, reference voltage for inverting]
Output voltage
Line regulation
Load regulation
Output current when shorted
[Internal regulator]
Output voltage REGA
[Under voltage lockout circuit]
Detection threshold voltage 1
Hysteresis width 1
Detection threshold voltage 2
Hysteresis width 2
Detection threshold voltage 3
Hysteresis width 3
[Startup circuit block]
Oscillating frequency
Operation start VBAT voltage
Soft start charge current
[Short protection circuit ]
Timer threshold voltage
SCP pin source current
SCP pin detection voltage
SCP pin standby voltage
[Triangular waveform oscillator]
Oscillating frequency
Frequency stability
RT pin voltage
[Soft start 23 block] (BD9738KN, BD9739KN)
Soft start charge current
[Error amp]
Low-level output voltage
High-level output voltage
Output sink current
Output source current
DTC pin upper resistance
DTC pin lower resistance
NON pin input range
Non-inverted pin reference voltage
[PWM comparator]
Input threshold voltage
MAX DUTY
MAX DUTY (step-up operation)
[Output circuit]
High-level output voltage
Low-level output voltage
High-side N-channel FET
on resistance
Low-side N-channel FET
on resistance
CH7 N-channel FET on
resistance
[Step-up/step-down selector ]
UDSEL pin
control voltage
Note: This IC is not designed to be radiation-resistant.
Parameter
Step-down
Step-up
Symbol
ΔV
ΔV
ΔV
V
R
R
D
D
V
V
V
R
V
DV
V
V
V
f
V
V
V
R
V
V
f
R
DV
V
I
START
I
V
I
I
V
OSC1
V
V
SS23
V
I
REGA
I
UDDO
UDUP
SCP
DTCU
DTCD
RES
NON7
MAX1
MAX2
REF2
STD1
STD2
STD3
SS1
Df
I
SATH
SATL
ONL7
T100
OS
TSC
SSC
OO
ONH
ST1
ONL
OI
OH
TC
RT
OL
T0
LO
ST1
ST2
ST3
LI
V
V
REGA
V
CC
CC
Min.
0.99
3.45
0.45
0.78
-0.3
450
0.2
2.4
2.3
1.5
1.1
2.1
0.5
0.9
50
36
36
20
65
77
77
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
－
×0.7
2
5
0
-1.6
- 0.3
3/14
V
Limits
CC
Typ.
0.50
1.00
1.49
1.95
300
200
120
500
270
300
270
300
1.0
4.0
1.0
2.5
3.6
2.4
2.0
2.2
2.2
1.0
1.0
0.3
1.3
0.2
0.8
0.7
50
22
10
72
72
30
95
85
85
－
－
－
－
1
4
-
-0.8
V
CC
Max.
1.01
12.5
3.75
0.55
1.22
220
170
550
125
500
500
500
500
V
7.5
2.6
2.5
3.3
2.3
1.5
1.1
1.6
1.4
1.5
－
－
－
－
－
－
15
－
－
－
－
40
－
－
－
93
93
－
×0.3
6
2
CC
mΩ
mΩ
Unit
kHz
kHz
mV
mV
mA
mV
mV
mV
mV
kΩ
kΩ
µA
µA
µA
µA
µA
Ω
%
%
%
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
V
VCC = 3.0 V to 9.5 V
IREF = 10 μA to 100 μA
VREF = 0 V
IREG = 1 mA
PVCCL monitor
VCC monitor
VREGA monitor
VBAT pin monitor
VSS1 = 0 V
FB pin monitor
VSCP = 0.1 V
(BD9740KN)
(BD9740KN)
RT = 11 k, CT = 180 pF
VCC = 3.0 V to 9.5 V
VSS23 = 0 V
INV = 2 V
INV = 0 V
FB = 1.7 V, VINV = 1.1 V
FB = 1.7 V, VINV = 0.9 V
(BD9740KN)
(BD9740KN)
0% duty
100% duty
VINV = 0.9 V, VSCP = 0 V
VINV = 0.9 V,
VSCP, UDSEL = 0 V
IO = 30 mA
IO = -30 mA
PVCCH = 5 V(IO = 200 mA)
(BD9740KN)
PVCCL = 5 V(IO = 200 mA)
(BD9740KN)
PVCCL = 5 V(IO = 50 mA)
Conditions
Technical Note
2010.09 - Rev.A