BD9139MUV Datasheet, PDF (2/17 Pages) Rohm – Output 2A or More High-efficiency Step-down Switching Regulators with Built-in Power MOSFET

BD9139MUV
Technical Note
●Electrical Characteristics
◎BD9139MUV (Ta=25℃ VCC=PVCC=3.3V, EN=VCC, R₁=10kΩ, R₂=5kΩ, unless otherwise specified.)
Parameter
Symbol
Min.
Typ.
Max.
Unit
Conditions
Standby current
ISTB
-
0
10
μA EN=GND
Active current
ICC
-
200
500
μA
EN Low voltage
VENL
-
GND
0.8
V
Standby mode
EN High voltage
VENH
2.0
Vcc
-
V
Active mode
EN input current
IEN
-
3.3
10
μA
VEN=3.3V
Oscillation frequency
FOSC
0.8
1
1.2
MHz
High side FET ON resistance
RONH
-
100
165
mΩ
PVCC=3.3V
Low side FET ON resistance
RONL
-
80
135
mΩ
PVCC=3.3V
ADJ Voltage
VADJ
0.788
0.800
0.812
V
ITH SInk current
ITHSI
10
18
-
μA
VADJ=1V
ITH Source Current
ITHSO
10
18
-
μA
VADJ=0.6V
UVLO threshold voltage
VUVLO1
2.400
2.500
2.600
V
VCC=3.3V→0V
UVLO release voltage
VUVLO2
2.425
2.550
2.700
V
VCC=0V→3.3V
Soft start time
TSS
0.5
1
2
ms
Timer latch time
TLATCH
0.5
1
2
ms
Output Short circuit
Threshold Voltage
VSCP
-
0.40
0.56
V
VADJ =0.8V→0V
●Block Diagram, Application Circuit
【BD9139MUV】
3.0 ± 0.1
D91
39
Lot No.
1PIN MARK
S
0.08 S
C0.2
1.4 ± 0.1
0.5
1
4
16
5
13
12
0.75
8
9
0.25
+ 0.05
− 0.04
(Unit : mm)
VCC
EN
VREF
Current
Comp
+
RQ
S
Gm Amp
+
SLOPE CLK
OSC
VCC
Soft
UVLO
Start
TSD
SCP
Current
Sense/
Protect
+
Driver
Logic
VCC
BST
PVCC
3.3V
Input
SW
PVCC
Output
PGND
GND
ADJ
ITH
RITH _CITH
R1 R2
Fig.2 BD9139MUV Block Diagram
Fig.1 BD9139MUV TOP View
●Pin No. & function table
Pin
Pin
No. name
1
SW SW pin
2
SW SW pin
3
SW SW pin
Function
4
SW SW pin
5 PVCC Highside FET source pin
6 PVCC Highside FET source pin
7 PVCC Highside FET source pin
8
BST Bootstrapped voltage input pin
Pin
Pin
No. name
Function
9
VCC VCC power supply input pin
10
EN Enable pin(High Active）
11
ADJ Output voltage detect pin
12
ITH
GmAmp output pin/Connected phase
compensation capacitor
13
GND Ground
14 PGND Lowside source pin
15 PGND Lowside source pin
16 PGND Lowside source pin
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2009.05 - Rev.A